The Federal Energy Independence and Security Act of 2007 mandated that all lightbulbs use 30 percent less energy than existing general-purpose incandescents starting with 100-watt bulbs in Jan. 1, 2012, and ending with the 40-watt bulb by 2014.

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LED (light emitting diodes)

Small light sources that fit onto an electrical circuit and don't have a filament that will burn out like ordinary incandescents.

History: LEDs have been around since the 1960s but gained popularity in recent years when a variety of white colored LEDs became available.

Energy-efficiency: LEDs not only last up to 25 to 50 times longer than standard incandescents, they also use 80% less energy. LEDs can last 30,000 to 50,000 hours. LEDs emit virtually NO energy as heat, compared to incandescents, which release 90% of their energy as heat!!