I see, that makes whole lotta sense.It's not the Pi really that I'd worry about, it's the 12V power supply and buck converter that I would be concerned with. I assume that any DC power items you're using (5v for the Pi, 12v for the lighting circuit) are external, and thus don't add any heat into the system. Mine will be fully enclosed. There will only be a single point that plugs into the wall, and that will bring 110v into the system to be converted and distributed as needed.