Using LEDs endows the light with a long life and a hefty price tag.

BBC: Philips LED bulb

There are a lot of Democrats who say that the price tag now is just eye-popping, especially in light of the CBO analysis.

WHITEHOUSE: Press Briefing

There's even a "white tag" market: When I install a more efficient light bulb, I can sell that efficiency gain to the fossil fuel power plant, just as if it's a green tag.

FORBES: Magazine Article