Lightbulbs featured include:
For more details, amazingly geeky EcoGeek Michael Cordingly has created an extremely useful spreadsheet [.xls] for figuring out what lighting option is best for you. You can find out how much it's going to cost you over the lifetime of the bulb, how much carbon it's going to pump into the atmosphere per year, and how frequently you'll need to change it.
If you're curious, the LEDs do best for reducing carbon output, but they'll cost you more over the life of the bulb than a CFL with equivalent light output, even with the decreased energy costs. Thanks Mike!
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