SunForce Mercury Vapor bulbs produce UVB, UVA, LIGHT and HEAT and provide high levels of UVA and UVB making them one of the most effective methods of simulating natural sunlight and heat. This simulation not only provides ideal levels for optimum health but can actually have life saving benefits.We are pleased to be the company that introduces the new standard in mercury vapor bulbs with the only individually pre-tested bulbs on the market that are guaranteed to produce UVB at 200 Microwatts/CM2 or better and over 400 Microwatts/CM2 of UVA.These bulbs throw UV up to 3 feet and are highly recommended for bearded dragons, chameleons, tortoises, iguanas, monitors, tegus, uromastyx, water turtles, sailfin lizards, basilisks and water dragons.