Lately, San Francisco-based Elemental LED has promoted two collections of LED , the Tess 7W and 9W LED Light Bulbs, to replace standard incandescent and CFL bulbs.
These light bulbs are able to produce the same brightness as 40W and 60W standard light bulbs respectively, but use less than 20 percent as much electricity. The new LED bulbs screw into any standard E26/E27 base. That translates into major savings on electricity bills as well as a dramatically reduced carbon footprint.