Can a light bulb be as cool as the iPhone?

What if, with the flick of a switch, you could turn your light fixture into a digital music player or a home monitor? As consumer technology increasingly resembles hardware plucked from "The Jetsons," a host of companies, including Google, General Electric and Samsung, are looking to make everyday appliances as ubiquitous, indispensable—and as cool—as a new Apple device. Count Sengled among those companies. The China-based company is one of several developing LED technology in what analysts at McKinsey estimate will grow into a $108 billion market by 2020.