Desiderata:
Energy efficient light bulbs
Longer lasting light bulbs
Recommended:
CFL (but see caveats)
CFL use less watts to produce the same light as regular incandescents. So how is consumer supposed to know which CFL to buy to replace their regular 100W bulb? Each box has a convenient "equivalent wattage" listed on it with tables like this:
In my experience, these equivalents are too optimistic. A good rule of thumb is : Bump up one level in the table. So if you wanted a 60W bulb, the table would recommend 14W CFL. Don't do it. Go for the 19W. You'll get much closer to what you expect.
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