"The prize bulb uses just 9.7 watts to match the light output of a 60-watt incandescent, compared with 12.5 watts for the product currently sold. The new lamp is also brighter than the one marketed now, at 910 lumens versus 800 lumens. And it is closer in color to a standard incandescent.
Both lamps last 25,000 hours, compared with 1,000 to 2,000 for a standard incandescent."
Details here at NY Times Green blog.