Yeah, the Luxos U, though you should realize that it doesn't put out light and charge at the same time. It's one or the other. (I don't recall all the specific of if you could charge something that was very light draw, but I've read that you cannot charge, say, a phone and have the light on at the same time).

There's also independent units that do the same thing, like the Supernova "the plug" that integrates into your stem or something.