Starting at just under $10, Cree's 9.5W LED replacement lamps are light on the wallet and, according the manufacturer, the planet: saving 84% of the energy compared to traditional lamps. The lamps replace 40W and 60W lamps, should last 25,000 hours, and have a 10-year limited warranty. They are instant-on lamps and are mercury free. The 60W incandescent replacement lamps delivers 800 lumens and consumes 9.5W, while the 40W incandescent replacement delivers 450 lumens and consumes 6W. They are available exclusively at Home Depot.