Halco - JC20 - 20W Halogen T3 G4 3000 Hour
- Halogen - T3
- G4 Base
- 3,000 Hours
Double-ended and pin based quartz lamps are composed of a quartz glass envelope surrounding a tungsten filament. The quartz envelope is filled with bromine or iodine halogen gas. The base of the lamp is ceramic attached with high-temperature cement. The quartz glass envelope may be clear or diffused. In addition to the tungsten filament, other wires made from molybdenum, copper, iron and/or nickel are used as support wires or for electrical conditions.