http://www.onebillionbulbs.com/
Most of my house has beeen changed to compact fluorescent lightbulbs. The few remaining will be gone in the next month.
Imagine if people all over the world mobilized to replace one billion standard incandescent light bulbs with energy-efficient compact fluorescent (CFL) light bulbs. What would that mean? It would mean that those people would save money each month on their electricity bill. It would mean they would save enough energy to light tens of millions of homes for a year. It would mean the prevention of greenhouse gases equivalent to the annual emissions of millions of cars.