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.

Ask a designer or electrician about LED lightbulbs, and prepare to get a longer answer than you expected. In the last decade, LEDs bulbs — which contain an array of light-emitting diodes (a type of ...