GE UltraMax Electronic Ballast, 120 to 277 V, Operating Frequency: 50/60 Hz, Number of Lamps: 1, Start Type: Instant, Ballast Factor: Normal, Black, Includes: (4) Electronic BallastsEnergy saving high efficiency instant start electronic ballast (>90%)Multi-voltage technology handles voltage from 120 to 277 VUL Type CC Rating provides protection against arcing in electrical devicesAnti-striation control for better light quality, with no striationsUL 55C ambient rating, high-temperature protection circuitCold temperature, 20 deg F minimum starting temperature