The RAB Lighting PC1200/277 is a photocontrol rated for 277V operation, providing automatic dusk-to-dawn switching for commercial and industrial floodlights and area luminaires on higher-voltage circuits. The twist-lock NEMA-style interface installs directly into compatible fixture receptacles, delivering reliable daylight-responsive on/off control without separate control wiring. Suited for commercial exterior lighting applications requiring 277V photocontrol capability.