Deltek Watran 80232 ballasts for F39T5 lamps are the optimal choice for a broad range of retail and commercial applications including schools, offices, department stores, and manufacturing. This electronic ballast operates F39 lamps with maximum efficacy and high lumen output. This ballast operates at a power factor of 98% with a 1.00 ballast factor. The Deltek 80232 electronic fluorescent ballast operates (2) F39T5 lamps at 120/277 input volts. Ideal for use in low light areas, this programmed start ballast is typically used in hallways, stairwells, and lobbies.