To compare apples to apples, I tested only LED bulbs that aim to replicate the classic 60-watt/800 lumen incandescent bulb. A little spec-splaining: Watts measure energy use, lumens measure ...

Plus, the near-infinite palate of LED colors allows GE to emulate its traditional Reveal and Soft White hues. Meanwhile, another company, Philips, is integrating LED bulbs into connective technology.

LED bulbs have a 19-year lifespan and sip electricity at about one tenth that of regular incandescent bulbs, but a 60-watt (or higher) replacement has been elusive.

Though the process for replacing interior light bulbs in vehicles' dome and map lights can depend on the make and model, here's how to do it in most cars, according to a mechanic.