U.S. Department of Energy projections published in April 2012 showed the government had expected the industry would only achieve efficiencies of 160 lumens per watt for LED lamps by 2015.

NPR: Goodbye Fluorescent Bulb? Philips Says Yes.

Cree already advertises an LED lamp it says reaches 200 lumens per watt under some circumstances.

NPR: Goodbye Fluorescent Bulb? Philips Says Yes.

The result is a relatively warm light, between 3, 000 and 4, 000 kelvin, that generates more than twice as many lumens per-watt as Philips' current LED bulbs.

ENGADGET