There are the LED lightbulbs you know you should buy, and then there are the insane 10 for $10 sales that try to lure you back to the incandescent days. But between everlasting light bulbs, app-controlled light bulbs and light bulbs that do the dishes and see into the future, it's pretty clear that change is upon us. Bulb life, light quality and price all factor in. What do you buy and why? Illuminate us below.