You want to be environmentally conscious, but doing so can be damned inconvenient. For example, replacing one of your incandescent bulbs with compact fluorescents can save about $30 of power over the lifetime of the bulb. Not bad, but fluorescents are dim, and they flicker. Plus, while they do last 10 times longer than incandescents, throwing them away is a pain in the neck due to the mercury content.
EarthLED Light Bulbs