Not really sure why you would want a bathtub that lights up, but there you have it. This free standing polyethylene tub has an internal muticolored, programmable LED light unit so you can bathe yourself in a soft amber glow (or green if you're feeling green that day).

And just so that your bathtub isn't the only thing that's lighting up, illuminated sinks are available too. Personally, if I saw a red or green glow coming from my bathroom from afar, I think I'd be really scared.

From Generate Design Inc., who make quite a bit of objects that light up, including this seating system, which I actually quite dig.