Operating Voltage 120 VAC ± 10% - 277 VAC ± 10% Frequency 50/60 Hz ATHD Meets ANSI C82.11-1993 Protection/Input - ATHD Meets ANSI C82.11-1993 Over Current Fuse Voltage Transients MOV (PER ANSI C82.11 – 1993) EMI/RFI FCC PART 18-A Protection/Output - Open Lamp - Shorted Lamp - Regulatory Approvals UL & cUL Listed - Type 1 Outdoors High Power Factor > .90 Open Circuit Voltage 600 V RMS Max. Ballast Min. Operating Temp. -20° F (-30º C) Ballast Maximum case Temp. 158º F (70º C) Ballast Lamp Starting Mode Instant Start Class P (Thermal) Sound Rating - A Available in 120V & 277V