Suitable for use as a floorlight or rooflight. Incorporates the largest sze square lens available, designed for clear spans up to 1500mm when installed as a floorlight for pedestrian loadings of 5KN/M². Contains 198 x 198mm glass lenses set into reinforced concrete ribs which are spaced at 254mm centres with an overall panel thickness of 90mm. Weight – 150 kg/m². In the interest of safety we recommend that when used as a floorlight, the glass lenses are sandblasted to increase slip resistance.