Energy-saving light bulbs

Energy-saving light bulbs

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Credit: SHEILA TERRY/SCIENCE PHOTO LIBRARY

Caption: Energy-saving light bulbs. Two different types of compact fluorescent lamps (CFL) or energy-saving light bulbs including a spiral type (left) and a rounded type (right). The spiral type is 11 watts and is equivalent to a 60 watt incandesent bulb. The rounded type is 15 watts and is equivalent to a 75 watt incandescent bulb. Fluorescent bulbs produce less heat than filament bulbs, therefore more of the electrical energy is converted to light, making them more efficient.

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