The Verge - Arnold Goetzke has a simple idea. And if you pause long enough to talk to him, he'll tell you about it. The idea is this: an extension cord you can control from your phone. Simple as that. Maybe you're sitting in your chair and you want to impress your girlfriend: out comes your phone and on comes the mood lighting. Or you've got it hooked up to your Christmas tree and you let your kids press the button that makes it all light up.