Exo-Terra Glow Light Porcelain Clamp Lamps offer versatility and reliable performance. These terrarium light fixtures feature metal reflectors heat-resistant ceramic sockets and spring-loaded swivel clamps that let you position light or heat wherever your pet needs it. Day and night fixture in one Heat-resistant porcelain socket Ideal for compact fluorescent and incandescent bulbs Great for nocturnal viewing The Glow Light features a glow-in-the-dark coating that stores light energy during the day and slowly releases it at night providing 24 hours of energy-efficient lighting. This is a multi-purpose fixture that fits a wide variety of screw-based bulbs including: Daytime Heat Lamps Intense Basking Spot Lamps Daylight Basking Spot Lamps Halogen Basking Spot Lamps Repti Glo Compact 2.0 5.0 and 10.0 Lamps Infrared Basking Spot Lamps Solar Glo Lamps and more. Note: The Exo-Terra Glow Light models are NOT to be used with the Exo-Terra Terrariums. Instead use the Exo-Terra Light Dome in conjunction with the Exo-Terra Light Bracket.