Electrical Efficiency in Lighting - the Compact Fluorescent Light Bulb

544px-Compact-Flourescent-BulbThe compact fluorescent lamp (CFL) is a direct replacement for the standard incandescent light bulb. Although they cost more they use much less electricity. They pay for their higher initial cost by reducing the electricity bill. After about 500 hours of use, they higher cost will be paid off. In a way they are free, since after another 50 hours they will have paid off their entire cost.

A 60W incandescent light bulb can be replaced by a 13W CFL. This is a 79% reduction in energy. Put another way, 15 compact fluorescent lamps use as much energy as four standard 60W incandescent lamps.

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