I've been keeping an eye on low-energy use lighting for my home for some time now. About five years ago I began a somewhat disappointing experiment with compact fluorescent bulbs. Not only were they more expensive, but they didn't produce very good light, they took a while to reach full brightness, and - most annoyingly - they seemed to burn out fairly quickly. Now, however, it looks like decent LED bulbs are reaching an acceptable price level, at least here in the US. Home Depot, for instance, is selling 40W equivalent LEDs for less than $10 each. While that seems like a lot, if you consider they are supposed to have an almost 30 year lifespan, and use roughly 1/10th as much electricity - then it starts to make sense. The performance of these bulbs seems excellent. I bought a "bright white" bulb for bedside reading, and the lower watt-equaivalent warm white for the other applications. The light is excellent, comparable to a good quality incandescent, IMHO. I calculated that my five most-used bulbs were on an average of 6 hours per day each. Five times 60 watts times six hours = 1.8 kW x 0.08 cost = $52/annual electricity cost for incandescents. Replacing these bulbs with LEDs (average 9 watts) brings my annual cost to burn these lights down to roughly $7.78 - saving me almost $45 per year, and giving a investment payback period of about 18 months. Add in the convenience of knowing that (theoretically, at least) I ought never need to replace a burned out lightbulb, and it starts to look like a pretty good deal. The only downside, if there is one, is that I'll have remember to pack and ship my lightbulbs the next time I move.