Skylux piramide polycarbonaat lichtkoepel dubbelwandig pc helder pmma opaal 1100 x 1100 mm 550 b Then be sure to consider Then be sure to consider a 500x1700 Skylux skylight Installing an electric roof access skylight with 16 00 PVC curb 800 x 2000 mm Roof opening = daylight size is not an everyday chore