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Designation of T-12 Fluorescents Energy Savings

Many household fluorescent fixtures are designed for 4 ft 40-watt T12 fluorescent tubes. The ballasts in these fixtures may overheat, and automatically shut the fixture off
if the 34-watt energy saving version of the 4 ft fluorescent tube is used as a replacement. It is important that manufacturer statements warning consumers not to use 34 watt tubes in household lighting fixtures be followed.

As a result of the 1992 Federal Energy Policy Act, 34-watt tubes designed for commercial facilities are now widely available at major home centers that serve both consumers and commercial users. Although these lamps are clearly marked "34-watt", for historical reasons they currently include a designation "F40?." which may confuse some purchasers.

Starting July 1, 2001, NEMA lamp manufacturers have agreed to transition to the standard industry designation system of "F" (for fluorescent), followed by the actual rated wattage of the tube for all T12 energy saving 4 ft, 3 ft and 2 ft "U" shaped fluorescent tubes.
During the transitional period, T12 energy saving fluore

scent tubes using both designations will be available. Regardless of the designation used on the energy saving tubes during the transition, they are the same tubes, and may be used interchangeably in commercial applications.

The designation of other sizes of T12 energy saving fluorescent tubes will not be affected. The implementation period is expected to last approximately 12 months.

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