Halogen Light Bulbs

A halogen lamp is an incandescent lamp in which a tungsten filament is sealed into a compact transparent envelope filled with an inert gas, plus a small amount of halogen such as iodine or bromine. They can last two or three times longer than regular bulbs because they are filled with chemically active halogen gases that preserve the filament.

The filament of an ordinary light bulb burns out because atoms of tungsten evaporate from its surface, so that it becomes thinner and thinner until it breaks. The evaporated tungsten is deposited on the inside surface of the bulb, where it forms a dark deposit.

The gas inside a halogen bulb combines with the tungsten atoms including those that have been deposited on the glass. When the combined molecules touch the hot filament, the tungsten is redeposited there, and the gas is released to repeat the process.

A halogen bulb is often 10 to 20 percent more efficient than an ordinary incandescent bulb of similar voltage, wattage, and life expectancy. Halogen bulbs may also have two to three times as long a lifetime as ordinary bulbs, sometimes also with an improvement in efficiency of up to 10 percent.

Halogen lamps get hotter than regular incandescent lamps because the heat is concentrated on a smaller envelope surface, and because the surface is closer to the filament. This high temperature is essential to their operation. Because the halogen lamp operates at very high temperatures, it can pose fire and burn hazards.

Common Halogen Bulb Types Commercial and Residential

• Halogen Reflector Floods
• Single End Halogen
• Double End Halogen
• Halogen Bipin light bulbs
• MR8 Halogen
• MR11 Halogen
• MR16 Halogen
• MR20 Halogen
• MB Halogen
• AR Halogen and ALR Halogen

Double End Halogen

Double Ended Recessed Contact (RSC Base) Halogen Light Bulbs. Do not be confused. The "J" type and "T" type designation are one and the same.

• Base: R7S
• Shape: T3

sub-types:

• Double End Halogen Short - 3 Inch (50 to 300 Watt) (??? - 5000 lumens) 78mm
• Double End Halogen Long - 4 5/8 Inch
• Double End Halogen - 10 Inch
• Pin Blade Halogen