Using compact fluorescent lightbulbs is one of the most effective ways to save energy in your home or business. However, they do contain small amounts of mercury and therefore require proper disposal. But don't despair! These bulbs are still responsible for less mercury than incandescent bulbs! A CFL uses 75% less energy than an incandescent light bulb and lasts at least 6 times longer. A power plant will emit 10mg of mercury to produce the electricity to run an incandescent bulb compared to only 2.4mg of mercury to run a CFL for the same time. See this EPA Fact Sheet for more details. Please check www.earth911.org or www.lamprecycle.org for more information about how to dispose of CFLs in your area.
According to the US Dept of Energy, incandescent lamps typically produce 12 to 15 lumens per Watt of electrical power. Compact fluorescent lamps produce at least 50 lumens per Watt, while currently available high-brightness LEDs can produce about 30 to 35 lumens per Watt.