Designed to fit Zoo Med's Naturalistic Terrariums Built-in reflector allows for increased heat & UVBpenetration On/Off switch is conveniently located on back of hood Available in 12 Zoo Med's Naturalistic Terrarium Hoods are designed to fit ZooMed's Naturalistic Terrariums. Different sockets allow for acombination of fluorescent, heat, daylight or nightlight bulbs;varies by hood size. The 12" Naturalistic Terrarium Hood: Includes a built-in reflector and socket for heat or UVBlamps This hood fits all 12" wide Naturalistic Terrariums UVB: Use with Zoo Med's Reptisun 5.0 UVB Compact FluorescentLamp for UVB and UVA Daytime Heat: Use Zoo Med's Daylight Blue Reptile Bulb (up to60 watts) 24 Hour Heat: Use Zoo Med's Nightlight Red Reptile Bulb (up to60 watts) Safety Instructions: Do not splice, repair or modify. Do not use in wet conditions. Use indoors only. Keep childrenand pets (other than your terrarium reptiles) away fromfixture. Fully insert plug. Fully extend cord before using. Do not cover with blankets, rugs or any material. Do not use damaged cord sets - inspect periodically. Do not exceed electrical rating. This appliance has a polarized plug (one blade is wider than theother). To reduce the risk of electrical shock, this plug isintended to fit in a polarized outlet only one way. If the plugdoes not fit fully in the outlet, reverse the plug. If it stilldoes not fit, contact a qualified electrician. Do not modify theplug in any way. Note: Reptiles should maintain a minimum safe distance of 6inches from any UVB lamp. Set up your terrarium in a way that willprevent your animals from getting too close to their UVB lamp.