Light is an important Yang component in rooms. Crystals break down white light into its components. The resulting rainbow colours stimulate, build up the Chi and enchant with their sparkling glitter.

They also help to stop energy loss. Especially in door-window oppositions, they provide calm and stability. Inanimate, dark corners are activated. In long corridors they slow down the sha-chi. Edges with cutting chi are defused. Rainbow crystals work even without direct light irradiation, as their potential is constantly present; even if we cannot see it, they constantly build up the Chi.