Now you can know the water temperature without getting wet! This new generation of faucets allows you to keep your hands dry while illuminating the hot water in red and the cool water in blue. Are you interested to know how it works? It’s not very complicated; an LED diode situated on the top of the faucet lights while the water passes in its lighting stream, so you feel that the water is colored. At 18 degrees, it comes out in blue and turns to orange by warming until it reaches the highest temperature at 38 degrees to turn in red. Those new faucets, besides being very practical, are good looking with their modern designs & minimalist shapes so they will add a very attractive look to any contemporary bathroom. The price of the lighting faucet varies according to the producer.