Rated wattage

means the wattage marked on the lamp. With respect to 4foot medium bi pin T8, T10, or T12 lamps, rated wattage means if the lamp is:

(1)  listed in ANSI C78.11991, the nominal wattage of a lamp determined by the lamp designation in Annex A.2 of ANSI C78.11991; or

(2)  a residential straightshaped lamp, the wattage a lamp consumes when operated on a reference ballast for which the lamp is designed; or

(3)  neither listed in ANSI C78.11991 nor a residential straightshaped lamp, the wattage a lamp consumes when using reference ballast characteristics of 236 volts, 0.43 amps and 439 ohms for T10 or T12 lamps, or reference ballast characteristics of 300 volts, 0.265 amps, and 910 ohms for T8 lamps.