LED Colour Faucet Light,Without battery and power drivce.Temperature controlled faucet light Low price and high quality, 1The Colour ... change according to the water temperiture.A. If the water temperature is under 40±2 (degrees Celsius) , the LED faucet light ... will emit blue light; B. If the water temperature is over 40±2 (degrees Celsius) , the LED faucet light ...