The Solatube natural lighting system uses a solar reflector inside an acrylic dome to capture the sun's light. The dome is mounted on a UV protected roof tile fitting that is unobtrusive and guaranteed leak proof. The light is directed down a highly mirrored aluminium tubing system to an attractive diffuser on the ceiling - designed to flood specific areas with an even spread of energy saving natural light. For internal bathrooms with no windows, Solatube has a single unit, which provides ventilation as well as lighting. Solatube guarantees the protected surface tube for 25 years against losing its reflectivity and surface deterioration.