Temperature Sensitive LED Faucet Light - Changes Red or Blue This is an LED for your tap Turning your tap on and off activates and deactivates the LED Excellent Water Glow LED Faucet Light with Temperature Sensor A temperature sensor is inbuilt the LED Faucet Light, glowing blue when the water is cool, glowing red when the water is too hot to touch. The LED creates casts a brilliant glow to your kitchen or bathroom in the dark