Compact fluorescent light bulbs (CFLs) are both more efficient, longer lasting, and guaranteed to save you money. In fact, Consumer Reports rates is at one of the top 10 best ways to save money. Lighting is the third biggest user in the home according to Micheal BlueJay (aka Mr. Electricity my favorite know-everything nut for energy savings). CFLS can give you the same amount of light as incandescents while consuming 70% less energy. Up front cost and perceived light quality issues often keep people from switching. Even better for the environment, light quality, and energy savings are LCD light bulbs, but they are substantially more expensive still. CFLs take some know-how to pick the right bulb (for the light quality you want and the type of fixture you have) but once you get it right, the cost of the bulb will be more than made up for by a reduction in your energy bill. Check out this guide for picking the right bulb.