MetaEfficient.com
...LED bulbs have many advantages over incandescents and compact fluorescent: they use very little power, they last 10 years or more, and they contain no hazardous substances. They are also tough: they can be dropped and turned off and on repeated without damage, they can operate in very cold or warm temperatures.
LED bulbs can also save you money in the long term, because an incandescent bulb requires about $300 worth of electricity over ten years of use. The LED bulbs cost $50 (for the 100 watt equivalent Evolux) and $90 (for the 60 watt equivalent Zetalux), and their cost to run over ten years is about $38...
http://www.metaefficient.com/leds/led-light-bulbs.html
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