Being the most frugal person I know, I don't believe the energy savings will equal the increased cost. Especially with production costs and disposal costs included. And if the bulb doesn't last five years I can just ship it back as long as I include about what I paid for it in the first place to cover shipping. :hmm: The only benefit I've found is that my bedroom stays a tiny bit cooler. Also factor in that most of you won't bother to find the best price on the bulbs in the first place. Basically it's a drop in the bucket.
Now make everyone drive a Honda Fit or Toyota Yaris and you're onto something.