How it works Users can adjust the water temperature according to the light colour. At 26?C and below the light appears blue. Between the temperatures of 26?C to 42?C the colour changes from blue to green. When the water temperature reaches 42?C and above the light is red. As well as the aesthetic value of the coloured light, the colour change facility acts as a vital indicator to the actual water temperature, making it easier to identity and adjust accordingly. This means no more stepping into a shower that?s too cold, or too hot! Health benefits When in use, water becomes magnetisable and expedites skin luster. Energy The showers generate electricity by water pressure without any other additional energy sources.