Placed on the roof, they allow up to 5 times more light to enter the building than vertical windows. In addition to saving energy for lighting, they can allow ventilation and smoke evacuation. Adequately sized glass skylights allow daylight to penetrate freely even inside large enclosed structures. 

A glass skylight dome provides a better quality of life even in confined environments. Complex glass constructions are particularly applicable in the architectural field. The shapes of skylights can be varied and very spectacular, improving the architectural appearance of buildings as well as their functionality.