Green Terms

Glossary of Green Terms

 

 

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Incandescent lamps operate without a ballast. They light up instantly, providing a warm light and excellent color rendition. You can also dim them. Light is emitted when electricity flows through-and heats-a tungsten filament. However, incandescent lamps have a low efficacy compared to other lighting options (10-17 lumens per Watt) and a short average operating life (750-2500 hours). Incandescent lamps are the least expensive to buy, but because of their relative inefficiency and short life spans, they usually are more expensive to operate. Source: U.S. Department of Energy Office of Energy Efficiency and Renewable Energy

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