This dual lamp fixture allows for multiple lamp combinations including UVB lamps, daytime heat lamps and nighttime heat lamps. It provides dual ceramic sockets for use with lamps up to 160 watts (combined wattage is 300 watts max.). It has a polished aluminum dome for maximum light & heat output and the Deep Dome extends beyond the face of the lamp preventing the lamp from "sticking out". It provides what you need for your reptiles in one unit.