Damp rated bulb, used for track and recessed lighting, can be used outside in a covered receptacle that is not directly exposed to the weather. Medium screw base, 50 watt incandescent equivalent. 500 lumens, 25000 average life hours, 3000K color temperature. 5 in H x 4.75 in D. Instant on to full brightness. RoHS Compliant. Mercury free.