Christmas lights go green
dim future. Holiday light bulbs were exempted from the federal law that’s phasing out other incandescent bulbs, and that seemingly ensured that they could keep decorating trees, decking halls and providing seasonal cheer. But now they’re being put to a test as fearsome as a government regulation: competition. LEDs – super-efficient lights that use a lot less energy than incandescents – have been around for years. LED stands for “light emitting diode,” which creates light by moving electrons over a semiconductor material, instead of heating up a filament, as a traditional bulb does.