The service life of the light board is up to 15-20 years, light transmission up to 85%; roof light board construction, must pay attention to the following six issues: 1, after laying, reserved the location of the light board, construction by the eave gradually to the ridge direction. Lighting plate directly buckle in the side crest of the steel plate. 2, light plate before fixing the first guide hole, hole diameter must be larger than the diameter of the fixing screws 6-9mm, in order to serve as a thermal expansion and contraction. 3, light plate and steel plate in the longitudinal lap, the minimum must be 200mm overlap, and affixed to the two water stops. Lighting board can look at Sichuan Jiaying.