GE 73199 GE259MAX-L/ULTRA 120/277-volt UltraMax Electronic Fluorescent T8 Multi-volt Instant Start Ballast, 2 or 1 F96T8 lamps. Multi-volt Instant Start T8 Ballast will accept up to 2 or 1 F96T8 lamps. Accommodates multi-voltages from 108 to 305-volts, extra versatile for your unique projects. Save on energy with the ultra efficient instant start ballast, more than 90-Percent electrical efficiency. Anti-striation circuitry helps to eliminate and prevent the spiraling effect from lights. Mounting dimensions: 8.9-Inch L x 1.1-Inch W, Mounting slot set 0.3-Inch apart. UltraMax ballasts have a lamp-friendly low-lamp-current crest factor and virtually "read" and adapt to incoming voltage. Parallel lamp operation keeps the unit maintenance easier to manage, if one lamp fails others will stay on. Unit provides auto-restart functions, thermal protection, and universal voltage. T8 ballast sound rating: Class A (20-24 decibels). Ballast factor rating of Low .77 for low power maximum savings, ballast factor rating controls light output and wattages of each lamp, a lower BF will reduce light output and wattage of each lamp, meaning more lamps would be needed to achieve a certain foot-candle level in the same area. Low profile housing and lightweight for portability. UL Type 1 Outdoor, UL Type HL, UL Class P listed, and ROHS Compliant - Industry standards for safety and performance.