Light Bulbs 101

Incandescent: The most common household light bulb. Electricity heats a tungsten filament, causing the bulb to glow. It emits around 10% of the energy it uses, making it very energy inefficient. Lasts about 1,000 hours. Can be dimmed.

Halogen: Variation on an incandescent bulb that is more energy efficient and a little brighter, but also more expensive. It burns at a higher temperature, thus considered a greater fire hazard. Last over three times as long as an incandescent bulb. Can be dimmed.

Fluorescent: Works by passing an electrical current through a tube of argon gas and mercury. It is very efficient and lasts between 10,000 and 20,000 hours. Cannot be dimmed.

Compact fluorescent lamps: New fluorescent technology provides better color, no flicker, and no noise. The long, coiled tube design can screw into incandescent light sockets. Compact fluorescent bulbs are initially more expensive than incandescent bulbs, but use 2/3 less energy. Can last up to 15,000 hours. Some styles can be dimmed.

Xenon: Provides a bright white light like halogen, but burns at a cooler temperature. It has no UV rays that might damage artwork over time. Some types can last up to 20,000 hours. Can be dimmed.

Tip: Because fluorescent bulbs contain measurable amounts of mercury, it is best to recycle them. Most fluorescent light bulb retailers will accept fluorescent bulbs. To find a retailer near you, visit
www.focusonenergy.com

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