Reptile Systems Eco Halogen provides light and heat inside the enclosure. Halogen lamps are long life often around 6-9 months and offer the closet spectrum of light and heat compared to the sun. With Reptile Sytems Eco Halogen you only replace the lamp inside meaning you only recycle 3% of the product rather than recycling the whole lamp. Eco Halogen provides visible light and IRA as well as IRB. Eco halogen doesn't offer UVB for animals so make sure you have suitable UVB lighting for your reptiles