LED light bulbs like the one above are cool. The one we got is 2.5W and it's equivalent to a 45W incandescent light bulb. There are 7 led lights inside that power the thing. LED lights should be what we all move to but the investments made in cfls (contains mercury, higher wattage) has everyone buying cfls first. LED lights are already showing up in street lights and will also get more popular in car head lights. They're also great in flashlights.
We're using one of the LED bulbs for the porch light, one over a vanity as a night light, and one other for my end table– so high use areas that need just enough light. The lights are a bit expensive and the brighter ones even moreso. But the ones we got should last a long, long time. And at 2.5W, can't really complain there.
The rest of the house we're using 7W to 13W compact fluorescent bulbs.
We also need (and on the lookout for) 3-way LED or CFL bulbs for lamps. The 3-way CFLs that are out now are way too big to fit in a lamp.
We're figuring, in lieu of solar panels, we can reduce the amount of electricity we use by having efficient appliances and lighting, turning off our electrical equipment when not in use, and insulating the house. Google has several more good energy saving tips.
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* I'm in a bit of a writer's funk. Maybe the WordCamp this Saturday will get me out of it. I've got a few more posts on products in general and then the rest of the year will be focused on work related stuff with hopefully some updates on a bathroom remodel once we get started at the end of June.