The LED Shower Light installs to a standard shower pipe in mere minutes. When you turn the shower on, the water powers a turbine and the LED Shower Light…well, lights up! Blue let’s you know the water is chilly. When the water warms up to 89° F (32° C), the light changes to red. Now you can step in and not freeze your giblets off. And you don’t even need to turn on the light now, because your whole shower glows.