Increases the overall ambient (inside) air temperature of your terrarium. Especially helpful for all tropical and desert sepcies i.e. iguanas bearded dragons etc. The ultimate Basking Light for all types of reptiles. Lasts up to 2000 hours. Tighter beam creates a more effective basking site than ordinary reflector bulbs. Provides beneficial UVA Rays important to the psychological well-being of all reptiles