Requires 3" minimum clearance in insulated ceilings. Will work in ceiling thickness from 3/8" to 5/8". Adjustable lamp socket, vertical position. Input Voltage: 120V AC, 60Hz. Dimmable to 10% with forward phase/TRIAC dimming. For optimal performance, use forward phase/TRIAC dimmer specifically designed for LED lamps. cCSAus Certified. Suitable for damp locations.