How do I know when the UV therapy lights are on?

UVB light is incredibly powerful, but is invisible to the human eye. The Solius app and colored indicator lights on the light panel let you know when your therapy is active. The indicator light on the panel will be yellow when the UV therapy lights are on. 

You receive therapy benefits despite the fact that you cannot see the light. It is essential that you wear the safety glasses to protect your eyes during therapy and ensure the room is free of other people and pets.