Tungsten halogen, quartz-halogen or aluminosilicate-halogen lamp, is an incandescent lamp consisting of a tungsten filament sealed into a clear envelope that is filled with a mixture of an inert gas and a small amount of a halogen. The combination of the halogen gas and the tungsten filament produces a halogen cycle. This is a chemical reaction which redeposits evaporated tungsten to the filament, increasing its life and maintaining the clarity of the envelope. This allows the filament to operate at a higher temperature than a standard incandescent lamp of similar power and operating life; this also produces light with higher luminous efficacy and color temperature. The small size of halogen lamp permits their use in compact optical fixtures. The small glass envelope may be enclosed in a much larger outer glass bulb for a bigger package; the outer jacket will be at a much lower and safer temperature, and it also protects the hot bulb from harmful contamination and makes the bulb mechanically more similar to a conventional lamp that it might replace.
Halogen lamps produce a continuous spectrum of light, from near ultraviolet too deep into the infrared. Since the lamp filament can operate at a higher temperature than a non-halogen lamp, the spectrum is shifted toward blue, producing light with a higher effective color temperature and higher power efficiency. This makes halogen lamps the only option for consumer light sources with black-body radiation spectrum similar to that of the Sun and most suitable for the eyes. Alternatively, multi-component glasses can be used, which have a natural UV-block. These glasses belong to the family of the aluminosilicate-glasses.
Amglo has proprietary technologies in tungsten filament settings that provide extended lamp lifetimes and extreme durability. The process is strictly controlled by thermal cameras to assure optimal setting time has been met. Amglo manufactures many different styles of halogen lamps including PAR lamps and miniatures.
Types of Halogen Lamps