Due to the energy inefficiency of traditional incandescent light bulbs, newer and more efficient bulbs continue to enter the consumer market. Each type of bulb has benefits and drawbacks, including halogen lights and compact fluorescent lights.
Like traditional incandescent bulbs, halogen bulbs produce light by heating a filament. However, the halogen gas they contain causes them to burn hotter and produce a more intensely white light than traditional bulbs. They typically have a useful life of 2,250 to 3,500 hours.
Compact Fluorescent Lights (CFLs)
CFLs are smaller versions of fluorescent bulbs, which produce light by electrically exciting a gas mixture (e.g., mercury vapour and argon). This requires much less energy than heating a filament. Although they have a higher price than traditional light bulbs, they last for about 10,000 hours, so they're cheaper in the long run.
The main difference between halogen lights and CFLs is their power consumption. A 300-watt halogen light can use 220 kilowatt-hours per year, whereas a 23-watt CFL typically uses a little more than 100 kilowatt-hours per year to produce roughly the same amount of light. Also, halogen lights burn at 538 degrees Celsius, which can pose a fire hazard. Because CFLs do not need to heat a filament, they operate at a much lower temperature.
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