Zoo Med's new 18 inch size Naturalistic Terrarium Hood is designed to fit all 18 inch wide Naturalistic Terrariums. This hood can hold one ReptiSun Compact Fluorescent UVB lamp and one incandescent heat lamp up to 60 watts (eg Zoo Med's Daylight Blue or Nightlight Red Reptile Bulbs). A built in reflector allows for increased heat and UVB penetration in your terrarium. Two seperate on/off switches allow for independent lamp operation. This makes it possible to turn the UVB lamp off at night without turning off your nighttime heat source.