The Arcadia Halogen Basking Lamps are powerful, crisp, bright and infra-red-a rich. These lamps are better reflected and insulated than standard glass lamps and therefore more energy efficient. This enables them to provide high levels of heat and visible light. The Arcadia Halogen Flood lamp has a built in metal reflector for optimal light delivery to the basking zone. Beam radius is 9inch/23cm+ at 15inch with solid heating over the whole central area. A fantastic source of heat and light for your reptile, these Arcadia Halogen Basking Spot lamps are great for secondary lighting in your vivarium or terrarium. While they don't give off UV (essential for most, if not all reptiles), they do help heat the air and light their environment, allowing your reptile a better chance of maintaining their optimum body temperature for homeostasis and good metabolic function. When used in conjunction with a light featuring a suitable UV output for your reptile, there are few comparable halogen basking lamps on the market - Arcadia are in the top of their class. The 75w Halogen comes available with a standard size halogen bulb, or as the larger PAR 30 size, ideal for bigger enclosures. The 100w bulb is a PAR 38, giving you a much larger size of bulb. Product Characteristics: Excellent colour rendition. High light and Heat output. 3 times the life of tungsten filament lamps. 25 degree beam angle. Dimmable. Screw Fitting. These bulbs will last three times longer than a conventional filament lamp.