Halogen cookers effectively combine the benefits of cooking with electricity and gas. They provide instant heat, via powerful infrared lamps, but are nonetheless clean and convenient.
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Halogen lamps work on the same principle as regular incandescent bulbs. Electric current flows through a threadlike conductor or filament, made from tungsten, causing it to become hot and emit light.
Halogen lamps contain a small amount of an electronegative halogen gas, such as bromine or iodine. The halogen gas is at a higher temperature --- up to 593 degrees Celsius -- and pressure than the inert gas in a regular light bulb. The intense heat provided by halogen heating elements means that you can roast, say, a chicken and all the trimmings in around 30 minutes.
The temperature of a halogen lamp is hot enough to cook food, but also causes the tungsten filament to disintegrate. The gas also causes the filament to reabsorb tungsten atoms, so halogen lamps last much longer than their regular counterparts.
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