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This Recommended Practice module includes the most up-to-date data on the many benefits of daylighting, including energy savings of 40-50% or more. It also offers information and expertise on daylight delivery methods, glazing systems, shading techniques, control strategies and daylight performance simulation tools. The challenges of daylighting include glare, unwanted solar heat gain, the control of electric lighting, shading systems and coordination of the multiple disciplines affecting daylighting performance from initial planning to actual occupancy.