Roof triangular sky lights consist of aluminum profiles and polycarbonate. Aluminum profiles are a special system. Iron profiles painted in RAL are also used for larger sizes. The multi-chamber polycarbonate can be: 10mm, 16mm, 20mm, 25mm, 32mm, 40mm. The width of the tape varies from 1500mm to 6000mm and there is no length limit. The light strips are installed on a pre-assembled, heat and waterproof board, which is at least 200 mm above the drainage surface. The triangle of the strip can have angles at the base of 30 degrees, 45 degrees and 60 degrees.