There's no gas and no tube, McGowan says. Diodes are little chips made of metal and metal alloys, painted with a coating that lights up when electrified. It's similar to the coating in CFL bulbs ...

and you’ve got a CFL. Both types of bulbs produce light by the excitation of a gas, and the problem they create for disposal is that the gas contains mercury, which is an environmental hazard.

Their replacement equivalents, compact fluorescent lightbulbs and light-emitting diode bulbs, are bright, use 75 to 80 percent less energy, and can save you $60 to $125 dollars per bulb in energy ...

Gov. Tim Pawlenty wants more electricity to be made from wind. In Congress, Collin Peterson and Norm Coleman are talking about new ways to make ethanol gas from Minnesota’s farm crops. Local ...