Tungsten-halogen lamp
Lámpara halógena de tungsteno
- Date
- 1955-1959 · confidence high
- Place
- East Cleveland, Ohio, United States
- Credited to
- Elmer Fridrich and Emmett Wiley (General Electric)
- Field
- Matter & energy
What it is
A quartz bulb with a halogen in its gas returns evaporated tungsten to the filament, so it lasts twice as long and burns hotter. It replaced ordinary lamps in projectors, car headlights and floodlights.
What it led to
- car headlights and film projectors
- halogen domestic and stage lighting
- the halogen cycle as a principle in other lamps