Replacing incandescent bulbs with compact fluorescent lights (CFLs) will save you an average of $100 per year in energy costs for every 10 bulbs you change. Because CFLs last 10 times longer than incandescents, you’ll also save about 10 minutes per year of time you would have otherwise spent buying and replacing burned-out bulbs.
If we all made this shift the energy we’d save would reduce global CO2 emissions by 30 million tons per year—equal to taking 5.2 million cars off the road.
