The ultimate basking light for all types of reptiles. Patented computer designed double reflector focuses 35% more light/heat into the beam than other reflector bulbs. Tighter beam creates a more effective basking site than ordinary reflector bulbs. Increases the overall ambient air temperature of your terrarium. Especialy helpful for all tropical and desert species i E Iguanas bearded dragons ect. Lasts up to 2000 hours