SHEILA TERRY / SCIENCE PHOTO LIBRARY SHEILA TERRY / SCIENCE PHOTO LIBRARY
Halogen light bulb. This incandescent bulb contains a tungsten filament enclosed in a small quartz envelope inside the bulb. The quartz envelope contains the vapour of a halogen, such as iodine or bromine, which allows the filament to operate at a much higher temperature than in a conventional tungsten bulb. This results in greater brightness and a longer life than standard incandescent bulbs.
Model release not required. Property release not required.