On the scoreboard of futuristic breakthroughs, it’s now light bulbs 1, flying cars 0. Philips’ L Prize, award-winning LED bulb ($60) will be available in stores starting this Sunday, Earth Day. An instant $10 rebate comes with it, along with a mind-mashing 30,000 hours of LED light. At four hours of use per day, that’s 20 years of light. 20 years! And you know what? When this bulb burns out, we still won’t have those damn cars.