Buying a light bulb can be complicated. If you don't take the time to figure out what type of bulb you need, it may not match the color of the other bulbs in the room or even work in your fixture.

Buying lightbulbs used to be a cinch. When your 60-watt incandescents burnt out, you simply bought more 60-watt bulbs. But incandescents wasted a lot of energy to create that warm glow and were phased ...