Dental halogen curing lights are widely used in dental practices. Halogen lights provide a blue light between 400-500 nm that is able to cure a variety of dental restorative materials. Dental halogen curing lights can become very hot, so they include a fan to cool the bulb. This can lead to frequent halogen bulb replacements. Dental halogen curing lights should have a variety of tips sizes available for different curing procedures. Features may include self-diagnostic system, bulb-life indicator, LCD display, built-in radiometer, varied time selection modes and audible tones to indicate curing completion. Bulb life should be around 75 hours. Choose a vendor who offers a bulb life guarantee.