This is old news but new news to me 
So I am going to write about it. I have never been a fan of home improvements, but with purchasing our first house in 3.5 weeks I have been thinking more and more about how exciting it could be to design a bathroom. I know... strange.
Through my searches I have come across the faucet lights which LED's light up when the water switches on, measure temperature of the water and then light up the colour of the temperature (between Blue and Red... Red being hot).
Via: Hansa