The Panasonic EverLED. This bulb is expected to produce the light equivalent of a 40watt incandescent for up to 19 years of regular use. The expected savings is listed as up to $23 a year on energy bills. This is great since they are expecting the bulb to sell for $40.

This is technology that we need to watch.

I could not find an article with much more information than I have shared here. The bulb is supposed to debut in Japan in October this year.