SAN FRANCISO -- Energy efficiency is coming to offices, convenience stores, and hotel hallways.

Pictured is a LED tube light from Green Ray that can fit into a standard fluorescent fixture. It costs about $70 dollars and comes with a clear tube or a frosted one. But even better, the tube is about 80 percent more energy efficient than a standard fluorescent tube, lasts far longer, and won't make that annoying buzzing sound when it's about to die.

The light quality is also surprisingly good. Many inexpensive LED fixtures tend to be dim. This had all of the hot lurid glow of a tube fluorescent. If you closed your eyes, you could almost smell the old hot dogs turning as you waited to pay for ten gallons of gas and Super Big Gulp.

Green Ray also has a dimmable LED bulb that fits into ordinary incandescent light sockets. Both are on display at West Coast Green, the environmental decorating and home show taking place in San Francisco.

Lemnis Lighting, meanwhile, will show off its LED bulb for replacing 60 watt incandescent bulbs. It consumes only six watts.