I've got to hand it too you, Indychus, this is an awesome little DIY project. My wife is already cussing you, since I've just found my next "spousal substitute" as she labels my projects.
I'm going to have to do the IR end of it because it's just too cool not too. I can think of all kinds of uses, aside from controlling the light fixture, where I can use this device. If nothing else I can turn on the bedroom TV at 3:00AM a couple times a week to freak the wife out. lol!
I'll probably still end up with one hard wired into the fixture though, so if you reverse engineer the fixture you have torn apart on your bench, be sure and let us know!