Household Lighting Choices

A halogen lamp, known as tungsten halogen, quartz halogen or quartz iodine is an incandescent lamp that has a small amount of a halogen such as iodine or bromine added.  This combination of the halogen gas and the tungsten filament produce a halogen cycle chemical reaction. It produces bright light but is dangerously hot and therefore expensive to run.

A Compact Fluorescent  light contains a mixture of argon and mercury gases that produces invisible ultraviolet light (UV) when the gas is excited by electricity.

A light emitting diode (LED) contains electrons that recombine with electron holes, releasing energy in the form of photons and illuminating the bulb.

Lights are now measured in Lumens and this number is shown on the outside of the packing box.  ‘Lumens’ is a measurement similar to ‘illumination’ and indicates the amount of light which is produced.


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