The 18 Naturalistic Terrarium Hood includes a built-in reflector and two sockets for heat and UVB lamps.This hood fits all 18 wide Naturalistic Terrariums (Zoo Med items# NT-3 or NT-4).UVB: Use with Zoo Meds ReptiSun 5.0 UVB Compact Fluorescent Lamp for both UVB and UVA.Heat: Use Zoo Meds Daylight Blue Reptile Bulb for daytime heat (up to 60 watts) or Zoo Meds Nightlight Red Reptile Bulb for 24 hour heat (up to 60 watts).