SECTION 140.6 – PRESCRIPTIVE REQUIREMENTS FOR INDOOR LIGHTING

A building complies with this section if:

i.    The Calculation of Adjusted Indoor Lighting Power of all proposed building areas combined, calculated under Subsection (a) is no greater than the Calculation of Allowed Indoor Lighting Power, Specific Methodologies calculated under Subsection (c); and

ii.    The Calculation of Allowed Indoor Lighting Power, General Rules comply with Subsection (b); and

iii.   General lighting complies with the Automatic Daylighting Controls in Secondary Daylit Zone requirements in Subsection (d).

The prescriptive limits on indoor lighting power are the smaller of the Actual and Allowed Indoor Lighting Power values determined in accordance with item i.

(a)        Calculation of Adjusted Indoor Lighting Power

The adjusted indoor Lighting Power of all proposed building areas is the total watts of all planned permanent and portable lighting systems in all areas of the proposed building; subject to the applicable adjustments under Subdivisions 1 through 4 of this subsection and the requirements of Subdivision 4 of this subsection.

Exception to Section 140.6(a): Up to 0.3 watts per square foot of portable lighting for office areas shall not be required to be included in the calculation of actual indoor lighting power.

1.   Two interlocked lighting systems: No more than two lighting systems may be used for an area, and if there are two they must be interlocked. Where there are two interlocked lighting systems, the watts of the lower wattage system may be excluded from the Adjusted Indoor Lighting Power if:

A.   An Installation Certificate detailing compliance with Section 140.6(a)1 is submitted in accordance with Section 10-103 and Section 130.4; and

B.   The area or areas served by the interlocking systems is an auditorium, a convention center, a conference room, a multipurpose room, or a theater; and

C.   The two lighting systems are interlocked with a Nonprogrammable Double-Throw Switch to prevent simultaneous operation of both systems.

For compliance with Part 6 a Nonprogrammable Double-Throw Switch is an electrical switch commonly called a "single pole double throw" or "three-way" switch that is wired as a selector switch allowing one of two loads to be enabled. It can be a line voltage switch or a low voltage switch selecting between two relays. It cannot be overridden or changed in any manner that would permit both loads to operate simultaneously.

2.   Reduction of wattage through controls.  In calculating Adjusted Indoor Lighting Power, the installed watts of a luminaire providing general lighting in an area 'listed in TABLE 140.6-A may be reduced by the product of (i) the number of watts controlled as described in TABLE 140.6-A, times (ii) the applicable Power Adjustment Factor (PAF), if all of the following conditions are met:

A.   An Installation Certificate is submitted in accordance with Section 130.4(b); and

B.   Luminaires and controls meet the applicable requirements of Section 110.9, and Sections 130.0 through 130.5; and

C.   The controlled lighting is permanently installed general lighting systems and the controls are permanently installed nonresidential-rated lighting controls.

When used for determining PAFs for general lighting in offices, furniture mounted luminaires that comply with all of the following conditions shall qualify as permanently installed general lighting systems:

i.    The furniture mounted luminaires shall be permanently installed no later than the time of building permit inspection; and

ii.    The furniture mounted luminaires shall be permanently hardwired; and

iii.   The furniture mounted lighting system shall be designed to provide indirect general lighting; and

iv.   Before multiplying the installed watts of the furniture mounted luminaire by the applicable PAF, 0.3 watts per square foot of the area illuminated by the furniture mounted luminaires shall be subtracted from installed watts of the furniture mounted luminaires; and

v.   The lighting control for the furniture mounted luminaire complies with all other applicable requirements in Section 140.6(a)2.

D.   At least 50 percent of the light output of the controlled luminaire is within the applicable area 'listed in TABLE 140.6-A. Luminaires on lighting tracks shall be within the applicable area in order to qualify for a PAF.

E.   Only one PAF from TABLE 140.6-A may be used for each qualifying luminaire. PAFs shall not be added together unless allowed in TABLE 140.6-A.

F.   Only lighting wattage directly controlled in accordance with Section 140.6(a)2 shall be used to reduce the installed watts as allowed by Section 140.6(a)2 for calculating the Adjusted Indoor Lighting Power. If only a portion of the wattage in a luminaire is controlled in accordance with  Section 140.6(a)2, then only that portion of controlled wattage may be reduced in calculating Adjusted Indoor Lighting Power.

G.   Lighting controls used to qualify for a PAF shall be designed and installed in 'addition to manual, multilevel, and automatic lighting controls required in Section 130.1, and in 'addition to any other lighting controls required by any provision of Part 6. PAFs shall not be available for lighting controls required by Part 6.

H.   To qualify for the PAF for daylight dimming plus OFF control, the daylight control and controlled luminaires shall comply with Section 130.1(d), 130.4(a)3 and 130.4(a)7, and shall additionally turn lights completely OFF when the daylight available in the daylit zone is greater than 150 percent of the illuminance received from the general lighting system at full power. The PAF shall apply only to the luminaires in the primary sidelit daylit zone and the skylit daylit zone.

I.    To qualify for the PAF for an occupant sensing control controlling the general lighting in large open plan office areas above workstations, in accordance with TABLE 140.6-A, the following requirements shall be met:

i.    The open plan office area shall be greater than 250 square feet; and

ii.    This PAF shall be available only in office areas which contain workstations; and 

iii.   Controlled luminaires shall only be those that provide general lighting directly above the controlled area, or furniture mounted luminaires that comply with Section 140.6(a)2 and provide general lighting directly above the controlled area; and

iv.   Qualifying luminaires shall be controlled by occupant sensing controls that meet all of the following requirements, as applicable:

a.   Infrared sensors shall be equipped by the manufacturer, of fitted in the field by the installer, with lenses or shrouds to prevent them from being triggered by movement outside of the controlled area.

b.   Ultrasonic sensors shall be tuned to reduce their sensitivity to prevent them from being triggered by movements outside of the controlled area.

c.   All other sensors shall be installed and adjusted as necessary to prevent them from being triggered by movements outside of the controlled area.

J.   To qualify for the PAF for an Institutional Tuning in TABLE 140.6-A, the tuned lighting system shall comply with all of the following requirements:

i.    The lighting controls shall limit the maximum output or maximum power draw of the controlled lighting to 85 percent or less of full light output or full power draw; and

ii.    The means of setting the limit is accessible only to authorized personnel; and

iii.   The setting of the limit is verified by the acceptance test required by Section 130.4(a)7; and

iv.   The construction documents specify which lighting systems shall have their maximum light output or maximum power draw set to no greater than 85% of full light output or full power draw.

K.   To qualify for the PAF for a Demand Responsive Control in TABLE 140.6-A, a Demand Responsive Control shall meet all of the following requirements:

i.    The building shall be 10,000 square feet or smaller; and

ii.    The controlled lighting shall be capable of being automatically reduced in response to a demand response signal; and

iii.   Lighting shall be reduced in a manner consistent with uniform level of illumination requirements in TABLE 130.1-A; and

iv.   Spaces that are nonhabitable shall not be used to comply with this requirement, and spaces with a lighting power density of less than 0.5 watts per square foot shall not be counted toward the building’s total lighting power.

L. To qualify for the PAFs for clerestory fenestration, horizontal slats, or light shelves in TABLE 140.6-A, the daylighting design shall meet the requirements in Section 140.3(d). The PAFs shall only apply to lighting in a primary or secondary sidelit daylit zone where continuous dimming daylighting controls meeting the requirements of Section 130.1(d) are installed.

3.   Lighting wattage excluded. The watts of the following indoor lighting applications may be excluded from Adjusted Indoor Lighting Power. (Indoor lighting not 'listed below shall comply with all applicable nonresidential indoor lighting requirements in Part 6.):

A.   In theme parks: Lighting for themes and special effects.

B.   Studio lighting for film or photography provided that these lighting systems are in 'addition to and separately switched from a general lighting system.

C.   Lighting for dance floors, lighting for theatrical and other live performances, and theatrical lighting used for religious worship, provided that these lighting systems are additions to a general lighting system and are separately controlled by a multiscene or theatrical cross-fade control station accessible only to authorized operators.

Lighting intended for makeup, hair, and costume preparation in performing arts facility dressing rooms, provided that the lighting is separately switched from the general lighting system, switched independently at each dressing station, and is controlled with a Vacancy Sensor.

D.   In civic facilities, transportation facilities, convention centers, and hotel function areas: Lighting for temporary exhibits, if the lighting is in 'addition to a general lighting system and is separately controlled from a panel accessible only to authorized operators.

E.   Lighting installed by the manufacturer in walk-in coolers or freezers, vending machines, food preparation equipment, and scientific and industrial equipment.

F.   In office buildings with medical and clinical areas and healthcare facilities: Examination and surgical lights, low-ambient night-lights, and lighting integral to medical equipment, provided that these lighting systems are additions to and separately switched from a general lighting system.

G.   Lighting for plant growth or maintenance, if it is controlled by a multilevel astronomical time-switch control that complies with the applicable provisions of Section 110.9.

H.   Lighting equipment that is for sale.

I.    Lighting demonstration equipment in lighting education facilities.

J.   Lighting that is required for exit signs subject to the CBC. Exit signs shall meet the requirements of the Appliance Efficiency Regulations.

K.   Exitway or egress illumination that is normally off and that is subject to the CBC.

L.   In hotel/motel buildings: Lighting in guest rooms (lighting in hotel/motel guest rooms shall comply with Section 130.0(b) (Indoor lighting not in guest rooms shall comply with all applicable nonresidential lighting requirements in Part 6.)

M.  In high-rise residential buildings: Lighting in dwelling units (Lighting in high-rise residential dwelling units shall comply with Section 130.0(b).) (Indoor lighting not in dwelling units shall comply with all applicable nonresidential lighting requirements in Part 6.)

N.   Temporary lighting systems.  (As defined in Section 100.1.)

O.   Lighting in occupancy group U buildings less than 1,000 square feet.

P.   Lighting in unconditioned agricultural buildings less than 2,500 square feet.

Q.   Lighting systems in qualified historic buildings, as defined in the California Historical Building Code (Title 24, Part 8), are exempt from the Lighting Power Density allowances, if they consist solely of historic lighting components or replicas of historic lighting components. If lighting systems in qualified buildings contain some historic lighting components or replicas of historic components, combined with other lighting components, only those historic or historic replica components are exempt. All other lighting systems in qualified historic buildings shall comply with the Lighting Power Density allowances.

R.   Lighting in nonresidential parking garages for seven or less vehicles: Lighting in nonresidential parking garages for seven or less vehicles shall comply with the applicable residential parking garage provisions of Section 150.0(k).

S.  Lighting for signs: Lighting for signs shall comply with Section 140.8

T.   Lighting in refrigerated cases less than 3,000 square feet.  (Lighting in refrigerated cases less than 3,000 square feet shall comply with the Title 20 Appliance Efficiency Regulations).

U.   Lighting in elevators where the lighting meets the requirements in Section 120.6(f).

V.   Lighting connected to a Life Safety Branch or Critical Branch, as specified in Section 517 of the California Electrical Code.

4.Luminaire Classification and Power Adjustment.

A.   Luminaire Classification and Power shall be determined in accordance with Section 130.0(c).

B.   Small Aperture Tunable-White and Dim-to-Warm Luminaires Lighting Power Adjustment. For qualifying small aperture tunable-white and dim-to-warm LED luminaires, the adjusted indoor lighting power of these luminaires shall be calculated by multiplying their maximum rated wattage by 0.75. Qualifying luminaires shall meet all of the following:

i.      Small Aperture. Qualifying luminaires longer than 18 inches shall be no wider than four inches. Qualifying luminaires with a length of 18 inches or less shall be no wider than eight inches.

ii.     Color Changing. Qualifying tunable-white luminaires shall be capable of a color change greater than or equal to 2000 Kelvin correlated color temperature (CCT). Qualifying dim-to-warm luminaires shall be capable of color change greater than or equal to 500 Kelvin CCT.

iii.    Controls. Qualifying luminaires shall be connected to controls that allows color changing of the luminaires.

C.   Tailored Method Display Lighting Mounting Height Lighting Power Adjustment. For wall display luminaires or floor display luminaires meeting Tailored Method Section 140.6(c)3G and H and where the bottom of luminaires are 10 feet 7 inches and greater above the finished floor, the adjusted indoor lighting power of these luminaires shall be calculated by multiplying their maximum rated wattage and the appropriated mounting height adjustment factor from TABLE 140.6-E. Luminaire mounting height is the distance from the finished floor to the bottom of the luminaire. General lighting shall not qualify for a mounting height multiplier.

(b)       Calculation of Allowed Indoor Lighting Power: General Rules.

1.   The allowed indoor lighting power allotment for conditioned areas shall be calculated separately from the allowed Lighting Power allotment for unconditioned areas.  Each allotment is applicable solely to the area to which it applies, and there shall be no trade-offs between conditioned and unconditioned area allotments.

2.   allowed indoor lighting power allotment shall be calculated separately from the allowed Outdoor Lighting Power allotment.  Each allotment is applicable solely to the area to which it applies, and there shall be no trade-offs between the separate Indoor and Outdoor allotments.

3.   The allowed indoor lighting power allotment for general lighting shall be calculated as follows:

A.   The Complete 'Building Method, as described in Section 140.6(c)1 shall be used only for an entire building, except as permitted by Section 140.6(c)1. As described more fully in Section 140.6(c)1, and subject to the adjustments listed’ there, the Allowed Indoor Lighting Power allotment for general lighting for the entire building shall be calculated as follows:

i.    For a conditioned building, the product of the square feet of conditioned space of the building times the applicable allotment of watts per square foot described in TABLE 140.6-B.  

ii.    For an unconditioned building, the product of the square foot of unconditioned space of the building times the applicable allotment of watts per square feet described in TABLE 140.6-B.

B.   The Area Category Method, as described in Section 140.6(c)2, shall be used either by itself for all areas in the building, or when some areas in the building use the Tailored Method described in Section 140.6(c)3. Under the Area Category Method (either by itself or in conjunction with the Tailored Method), as described more fully in Section 140.6(c)2, and subject to the adjustments 'listed there, the allowed Indoor Lighting Power allotment for general lighting shall be calculated for each area in the building as follows:

i.    For conditioned areas, by multiplying the conditioned square feet of the area times the applicable allotment of watts per square foot for the area shown in TABLE 140.6-C or TABLE 140.6-D if the Tailored Method is used for that area).

ii.    For unconditioned areas, by multiplying the unconditioned square feet of the area times the applicable allotment of watts per square foot for the area shown in TABLE 140.6-C (or TABLE 140.6-D if the Tailored Method is used for that area).

The allowed indoor lighting power allotment for general lighting for one area for which the Area Category Method was used may be increased up to the amount that the allowed indoor lighting power allotment for general lighting for another area using the Area Category Method or Tailored Method  is decreased, except that such increases and decreases shall not be made between conditioned and unconditioned space. 

C.   The Tailored Method, as described in Section 140.6(c)3, shall be used either by itself for all areas in the building, or when some areas in the building use the Area Category Method described in Section 140.6(c)2.  Under the Tailored Method (either by itself or in conjunction with the Area Category Method) as described more fully in Section 140.6(c)3, and subject to the adjustments listed there, allowed Indoor Lighting Power allotment for general lighting shall be calculated for each area in the building as follows:

i.    For conditioned areas, by multiplying the conditioned square feet of the area times the applicable allotment of watts per square foot for the area shown in TABLE140.6-D (or TABLE140.6-C if the Area Category Method is used for that area);

ii     For unconditioned areas, by multiplying the unconditioned square feet of the area times the applicable allotment of watts per square foot for the area shown in TABLE140.6-D (or TABLE140.6-C if the Area Category Method is used for that area);

The allowed indoor lighting power allotment for general lighting for one area for which the Tailored Method was used may be increased up to the amount that the allowed indoor power lighting power Lighting for general lighting for another area is decreased, but only if the Tailored Method or Area Category Method was used for the other area, except that such increases and decreases shall not be made between conditioned and unconditioned space.

D.   If the Area Category Method is used for an area, the Tailored Method may not be used for that area. If the Tailored Method is used for an area, the Area Category Method may not be used for that area.

4.   Allowed Indoor Lighting Power allotments for all lighting power allotments other than general lighting shall be restricted as follows:

A.   When using the Area Category Method, allowed indoor lighting power allotments for specialized task work; ornamental; precision commercial and industrial work; white board or chalk board; accent, display and feature; decorative; or Videoconferencing Studio; may not be increased as a result of, or otherwise traded off against, decreasing any other allotment; and

B.   When using the Tailored Method, allowed Indoor Lighting Power allotments for wall display; floor display and task; ornamental/special effect; or very valuable display case; may not be increased, or otherwise traded between any of the separate allotments.

(c)        Calculation of Allowed Indoor Lighting Power: Specific Methodologies.

The allowed indoor lighting power for each building type, or each primary function area shall be calculated using only one of the methods in Subsection 1, 2 or 3 below as applicable.

1.   Complete Building Method. Requirements for using the Complete Building Method include all of the following:

A.   The Complete Building Method shall be used only for building types, as defined in Section 100.1, that are specifically 'listed’ in TABLE 140.6-B. (For example, retail and wholesale stores, hotel/motel, and high rise residential buildings shall not use this method.)

B.   The Complete Building Method shall be used only on projects involving:

i.    Entire buildings with one type of use occupancy; or

ii.    Mixed occupancy buildings where one type of use makes up at least 90 percent of the entire building  (in which case, when applying the Complete Building Method, it shall be assumed that the primary use is 100 percent of the building); or

iii.   A tenant space where one type of use makes up at least 90 percent of the entire tenant space (in which case, when applying the Complete Building Method, it shall be assumed that the primary use is 100 percent of the tenant space).

C.   The Complete Building Method shall be used only when the applicant is applying for a lighting permit and submits plans and specifications for the entire building or the entire tenant space.

D.   Under the Complete Building Method, the allowed indoor lighting power allotment is the Lighting Power Density value times the floor area of the entire building.

E.   For buildings including a parking garage plus another type of use listed in TABLE 140.6-B, the parking garage portion of the building and other type of use portion of the building shall each separately use the Complete Building Method.

2.   Area Category Method. Requirements for using the Area Category Method include all of the following:

A.   The Area Category Method shall be used only for primary function areas, as defined in Section 100.1, that are 'listed in TABLE 140.6-C.  For primary function areas not listed, selection of a reasonably equivalent type shall be permitted.

B.   Primary function Areas in TABLE 140.6-C shall not apply to a complete building. Each primary function area shall be determined as a separate area.

C.   For purposes of compliance with Section 140.6(c)2; an “area" shall be defined as all contiguous areas that accommodate or are associated with a single primary function area 'listed in TABLE 146.0-C.

D.   Where areas are bounded or separated by interior partitions, the floor area occupied by those interior partitions may be included in a primary function area.

E.   If at the time of permitting for a newly constructed building, a tenant is not identified for a multitenant area, a maximum of 0.4 watts per square foot shall be allowed for the lighting in each area in which a tenant has not been identified. The area shall be classified as unleased tenant area.

F.   Under the Area Category Method, the allowed indoor lighting powerfor each primary function area is the Lighting Power Density value in TABLE 140.6-C times the square feet of the primary function area. The total allowed indoor lighting power density for the building is the sum of all allowed indoor lighting power densities for all areas in the building.

G.   In addition to the allowed indoor lighting power  calculated according to Sections 140.6(c)2A through F, the building may add additional lighting power allowances for qualifying lighting systems as specified in the Qualifying Lighting Systems column in TABLE 140.6-C under the following conditions:

i.    Only primary function areas having a lighting system as specified in the Qualifying Lighting Systems column in TABLE 140.6-C and in accordance with the corresponding footnote of the TABLE shall qualify for the additional lighting power allowances; and

ii.    The additional lighting power allowances shall be used only if the plans clearly identify all applicable task areas and the lighting equipment designed to illuminate these tasks; and

iii.   Tasks that are performed less than two hours per day or poor quality tasks that can be improved are not eligible for the additional lighting power allowances; and

iv.   The additional lighting power allowances shall not utilize any type of luminaires that are used for general lighting in the building; and

v.   The additional lighting power allowances shall not be used when using the Complete Building Method, or when the Tailored Method is used for any area in the building; and

vi.   The additional lighting power allowed is the smaller of:

a.   the lighting power density listed in the “Allowed Additional Lighting LPD” column in TABLE 140.6-C, times the square feet of the primary function, or

b.   the Adjusted Indoor Lighting Power of the applicable lighting; and

vii.  In 'addition to all other additional lighting power allowed under Sections 140.6(c)2Gi through vi, up to 1.0 watts per square foot of additional lighting power shall be allowed in a videoconferencing studio, as defined in Section 100.1, provided the following conditions are met:

a.   A completed and signed Installation Certificate is prepared and submitted in accordance with Section 130.4(b), specifically detailing compliance with the applicable requirements of Section 140.6(c)2Gvii; and

b.   The Videoconferencing Studio is a room with permanently installed videoconferencing cameras, audio equipment, and playback equipment for both audio-based and video-based two-way communication between local and remote sites; and

c.   General lighting is switched in accordance with TABLE 130.1-A; and

d.   Wall wash lighting is separately switched from the general lighting system; and

e.   All of the lighting in the studio, including general lighting and additional lighting power allowed by Section 140.6(c)2Gvii is controlled by a multiscene programmable control system (also known as a scene preset control system).

3.   Tailored Method. Requirements for using the Tailored Method include all of the following:

A.   The Tailored Method shall be used only for primary function areas 'listed in TABLE 140.6-D, as defined in Section 100.1.

B.   Allowed Indoor Lighting Power allotments for general lighting shall be determined according to Section 140.6(c)3F, as applicable.

C.   For compliance with Section 140.6(c)3, an "area" shall be defined as all contiguous areas that accommodate or are associated with a single primary function area listed in TABLE 140.6-D.

D.   Where areas are bounded or separated by interior partitions, the floor area occupied by those interior partitions may be included in a Primary Function Area.

E.   In 'addition to the allowed indoor lighting power allotments for general lighting calculated according to Sections 140.6(c)3F, as applicable, the building may add additional lighting power allowances  for wall display lighting, floor display lighting and task lighting, ornamental/special effects lighting, and very valuable display cases lighting according to Section 140.6(c)3G through J.

F.   Determine allowed indoor lighting power allotments for general lighting for primary function areas 'listed in TABLE 140.6-D as follows:

i.    Use the General Illumination Level (Lux) listed in Column 2 of Table 140.6-D to determine the Allowed General Lighting Power Density allotments for the area.

ii.    Determine the room cavity ratio (RCR) for the area. The RCR shall be calculated according to the applicable equation in TABLE 140.6-F.

iii.   Find the allowed General Lighting Power Density allotments in TABLE 140.6-G that is applicable to the General Illuminance Level (Lux) from Column 2 of Table 140.6-D (as described in Item i.) and the RCR determined in accordance with TABLE 140.6-F (as described in Item ii).

iv.   Determine the square feet of the area in accordance with Section 140.6(c)3C and D

v.   Multiply the allowed Lighting Power Density allotment, as determined in accordance with Item iii by the square feet of each primary function area, as determined in accordance with Item iv. The product is the allowed indoor lighting power allotment for general lighting for the area.

G.   Determine additional allowed power for wall display lighting according to column 3 of Table 140.6-D for each primary function area as follows:

i.    Floor displays shall not qualify for wall display allowances.

ii.    Qualifying wall lighting shall:

a.   Be mounted within 10 feet of the wall having the wall display. When track lighting is used for wall display, and where portions of that lighting track are more than 10 feet from the wall and other portions are within 10 feet of the wall, portions of track more than 10 feet from the wall shall not be used for the wall display allowance.

b.   Be a lighting system type appropriate for wall lighting. Lighting systems appropriate for wall lighting are lighting track adjacent to the wall, wall-washer luminaires, luminaires behind a wall valance or wall cove, or accent light. (Accent luminaires are adjustable or fixed luminaires with PAR, R, MR, AR, or luminaires providing directional display light.)

iii.   Additional allowed power for wall display lighting is available only for lighting that illuminates walls having wall displays. The length of display walls shall include the length of the perimeter walls, including but not limited to closable openings and permanent full height interior partitions. Permanent full height interior partitions are those that (I) extend from the floor to within two feet of the ceiling or are taller than ten feet and (II) are permanently anchored to the floor.

iv.   For wall display lighting where the bottom of the luminaire is greater than 10 feet 6 inches above the finished floor, the mounting height adjustment factor from Table 140.6-E can be used to adjust the installed luminaire wattage as specified in Section 140.6(a)4C.

v.   The allowed power for wall display lighting shall be the smaller of:

a.   the “wall display lighting power density” determined in accordance with TABLE 140.6-D, multiplied by the wall display lengths determined in accordance with Item iii; and 

b.   The Adjusted Indoor Lighting Power used for the wall display lighting systems.

vi.   Lighting internal to display cases that are attached to a wall or directly adjacent to a wall are counted as wall display lighting as specified in Section 140.6(c)3G. All other lighting internal to display cases are counted as floor display lighting as specified in Section 140.6(c)3H, or as very valuable display case lighting as specified in Section 140.6(c)3J.

H.   Determine additional allowed power for floor display lighting and task lighting as follows:

i.    Displays that are installed against a wall shall not qualify for the floor display lighting power allowances.

ii.    Lighting internal to display cases that are not attached to a wall and not directly adjacent to a wall, shall be counted as floor display lighting in accordance with Section 140.6(c)3H; or very valuable display case lighting in accordance with Section 140.6(c)3J.

iii.   Additional allowed power for floor display lighting, and additional allowed power for task lighting, may be used by qualifying floor display lighting systems, qualifying task lighting systems, or a combination of both. For floor areas qualifying for both floor display and task lighting power allowances, the additional allowed power shall be used only once for the same floor area, so that the allowance shall not be additive.

iv.   Qualifying floor display lighting shall:

a.   Be mounted no closer than 2 feet to a wall.

b.   Consist of only (I) directional lamp types, such as PAR, R, MR, AR; or (II) luminaires providing directional display light.

c.   If track lighting is used, shall be only track heads that are classified as direction lighting types.

v.   Qualifying task lighting shall:

a.   Be located immediately adjacent to and capable of illuminating the task for which it is installed.

b.   Be of a type different from the general lighting system.

c.   Be separately switched from the general lighting system.

vi.   If there are illuminated floor displays, floor display lighting power shall be used only if allowed by column 4 of TABLE 140.6-D.

vii.  The square footage of floor displays or the square footage of task areas shall be determined in accordance with Section 140.6(c)3C and D, except that any floor area designed to not have floor displays or tasks, such as floor areas designated as a path of egress, shall not be included for the floor display allowance.

viii. For floor display lighting where the bottom of the luminaire is greater than 10.6 feet above the finished floor, multiply the floor display installed watts by the appropriate mounting height adjustment factor from Table 140.6-E to calculate the Adjusted Indoor Lighting Power as specified in Section 140.6(a)4C.

ix.   The allowed power for floor display lighting for each applicable area shall be the smaller of:

a.   The allowed floor display and task lighting power determined in accordance with Section 140.6(c)3Hvi multiplied by the floor square footage determined in accordance with Section 140.6(c)3Hvii; and

b.   The Adjusted Indoor Lighting Power used for the floor display lighting systems.

I.    Determine additional allowed power for ornamental/special effects lighting as follows:

i.    Qualifying ornamental lighting includes luminaires such as chandeliers, sconces, lanterns, neon and cold cathode, light emitting diodes, theatrical projectors, moving lights and light color panels when any of those lights are used in a decorative manner that does not serve as display lighting or general lighting. 

ii.    Additional lighting power for ornamental/special effects lighting shall be used only if allowed by Column 5 of TABLE 140.6-D.

iii.   Additional lighting power for ornamental/special effects lighting shall be used only in areas having ornamental/special effects lighting. The square footage of the floor area shall be determined in accordance with Section 140.6(c)3C and D, and it shall not include floor areas not having ornamental/special effects lighting.

iv.   The additional allowed power for ornamental/special effects lighting for each applicable area shall be the smaller of:

a.   The product of the “allowed ornamental/special effects lighting power” determined in accordance with Section 140.6(c)3Iii, multiplied by the floor square footage determined in accordance with Section 140.6(c)3Iiii; and

b.   The Adjusted Indoor Lighting Power of allowed ornamental/special effects lighting.

J.   Determine additional allowed power for very valuable display case lighting as follows:

i.    Additional allowed power for very valuable display case lighting shall be available only for display cases in appropriate function areas in retail merchandise sales, museum and religious worship.

ii.    To qualify for additional allowed power for very valuable display case lighting, a case shall contain jewelry, coins, fine china, fine crystal, precious stones, silver, small art objects and artifacts, and/or valuable collections the display of which involves customer inspection of very fine detail from outside of a locked case.

iii.   Qualifying lighting includes internal display case lighting or external lighting employing highly directional luminaires specifically designed to illuminate the case or inspection area without spill light, and shall not be fluorescent lighting unless installed inside of a display case.

iv.   If there is qualifying very valuable display case lighting, in accordance with Section 140.6(c)3Jii, the smallest of the following separate lighting power for display cases presenting very valuable display items is permitted:

a.   The product of the area of the primary function and 0.55 watt per square foot; or

b.   The product of the area of the display case and 8 watts per square foot; or

c.   The Adjusted Indoor Lighting Power of lighting for very valuable displays.

(d)       Automatic Daylighting Controls in Secondary Daylit Zones.

All luminaires providing general lighting that is in, or partially in a Secondary Sidelit Daylit Zone, and that is not in a Primary Sidelit Daylit Zone shall:

1.   Be controlled independently from all other luminaires by automatic daylighting controls that meet the applicable requirements of Section 110.9; and

2.   Be controlled in accordance with the applicable requirements in Section 130.1(d); and

3.   All Secondary Sidelit Daylit Zones shall be shown on the plans submitted to the enforcing agency.

EXCEPTION 1 to Section 140.6(d): Luminaires in Secondary Sidelit Daylit Zone(s) in an enclosed space in which the combined total general lighting power in Secondary Daylit Zone(s)  is less than 120 watts, or where the combined total general lighting power in Primary and Secondary Daylit Zone(s) is less than 240 watts.

      EXCEPTION 2 to Section 140.6(d): Luminaires in parking garages complying with Section 130.1(d)3.

EXCEPTION 3 to Section 140.6(d): Areas adjacent to vertical glazing below an overhang, where there is no vertical glazing above the overhang and where the ratio of the overhang projection to the overhang rise is greater than 1.5 for South, East and West orientations, or where the ratio of the overhang projection to the overhang rise is greater than 1 for North orientations.

EXCEPTION 4 to Section 140.6(d): Rooms that have a total glazing area of less than 24 square feet, or parking garage areas with a combined total of less than 36 square feet of glazing or opening.

EXCEPTION 5 to Section 140.6(d): Luminaires in sidelit daylit zones in retail merchandise sales and wholesale showroom areas.

TABLE 140.6-A LIGHTING POWER ADJUSTMENT FACTORS (PAF)

TABLE 140.6-B COMPLETE BUILDING METHOD LIGHTING POWER DENSITY VALUES

TABLE 140.6-C AREA CATEGORY METHOD - LIGHTING POWER DENSITY VALUES (WATTS/FT²)

TABLE 140.6-D TAILORED METHOD LIGHTING POWER ALLOWANCES

TABLE 140.6-E TAILORED WALL AND FLOOR DISPLAY MOUNTING HEIGHT ADJUSTMENT FACTORS

TABLE 140.6-F  ROOM CAVITY RATIO (RCR) EQUATIONS

TABLE 140.6-G TAILORED METHOD GENERAL LIGHTING POWER ALLOWED
 – BY ILLUMANCE AND ROOM CAVITY RATIO

NOTE: Authority: Sections 25213, 25218, 25218.5, 25402 and 25402.1, Public Resources Code. Reference: Sections 25007, 25008, 25218.5, 25310, 25402, 25402.1, 25402.4, 25402.5, 25402.8, and 25943, Public Resources Code.