Reptile Halogen Heat Bulb - 100 Watt - 1 Bulb These Halogen Bulbs Are Made Specifically For Reptiles Halogen bulbs contain significantly more heat, light and UVA than you find in comparable bulbs. Your reptiles get more of what they need with this bulb. It enhances the appearance of the colors in your reptile. Use in a ceramic based fixture/clamp lamp only, don't use in plastic socket fixtures.