In halogen lamps, the quartz envelope is closer to the filament than the glass used in conventional light bulbs. Heating the filament to a high temperature causes the tungsten atoms to evaporate and ...

A halogen or tungsten-halogen lamp is a high-pressure incandescent lamp containing a halogen gas such as iodine or bromine which allows the filament to be operated at a higher temperature than an ...

The filament is enclosed in halogen gas so it can burn hotter ... as what you want to read or sew is well lit. Put a floor or ...