GE 29676 GE332-MVPS-H 120/277-volt Ultra Start Electronic Fluorescent T8 Programmed Rapid Start Ballast, 3 F32T8 lamps. Programmed Rapid Start T8 Ballast will accept up to 3 F32T8 lamps. Accommodates multi-voltages from 120 to 277-volts, extra versatile for your unique projects. Anti-striation circuitry helps to eliminate and prevent the spiraling effect from lights. The rapid start electronic ballast is for all general fluorescent lighting applications. Mounting dimensions: 8.9-Inch L x 1.1-Inch W, Mounting slot set 0.3-Inch apart. Ultra Start ballasts provide greater than 100,000 starts and have the equivalent energy savings of instant start ballasts. additionally offering a long lamp life similar to a programmed start ballast. Parallel lamp operation keeps the unit maintenance easier to manage, if one lamp fails others will stay on. Unit is thermally protected and features an auto-restart function. T8 ballast sound rating: Class A (20-24 decibels). Ballast factor rating of High 1.15 for high power, high bay light output, 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. Ultra-efficient programmed start ballasts with more than 90-Percent efficiency. Suitable for high temperature applications. Runs quietly with most 120-volt applications, less than 10-Percent Total Harmonic Distortion (THD). less than 20-Percent with other approved lamps. UL Type 1 Outdoor, UL Type HL, and UL Class P listed , ROHS Compliant, NEMA Premium, ANSI C62.41 - Industry standards for safety and performance.