Electric lamps compact fluorescent

Fluorescent lamps are more efficient than incandescent lamps in converting electricity into light. In the near future, even more efficient LED (light-emitting diode) lamps will replace fluorescent lamps. Replacing a 75 W incandescent bulb with an 18 W compact fluorescent bulb saves 57 W. Over the 10 000-h lifetime of the fluorescent bulb, you will reduce CO2 emission by -600 kg and will put 10 kg less SO2 into the atmosphere (see Problem 19-22). Alas, fluorescent bulbs contain Hg and should be recycled at a collection center where Hg will be captured from the bulbs. They should not be discarded as ordinary waste. 

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