with every thing said so far, CFL may not be the best solution, but it is still far better than the old fashioned incandescent bulbs.

SO REPLACE THEM WITH CFL!!!

We are looking into the latest generation of solar water heater using evacuated heat tubes. Total system cost is about $3,000 with installation. Plus the energy credit from the fed/local, I think it will payback in about 3 to 4 years like Mr. Silver's office.

The hot water can be used for baseboard heaters too.

Several companies who sell solar water heater:

www.siliconsolar.com
www.thermotech.com

www.solartoday.org has lots of good information and links.

Shawn