Properly designed daylighting systems save energy and costs
Replacing artificial lighting systems with an effective daylighting system can reduce a building’s energy costs by as much as 30% to 70%. It is essential that lighting controls be utilized in a good daylighting system. If the artificial lights are not turned off when the appropriate light levels are met the daylighting system is probably not saving any money on energy.
There are skylight manufacturers that tie the available daylighting into the lighting controls to always insure correct amounts of light and at the same time manage costs to avoid waste.