However, the potential advantages of daylight in classrooms for improving visual performance of children with or without properly corrected eyesight has not been systematically studied.

  • Because of inconsistent results and the small number of well-designed studies, there is insufficient evidence at this time to determine whether or not an association exists between daylighting and student performance.

  • A growing body of evidence suggests that lighting may play an important nonvisual role in human health and well-being through the circadian system. However, the effect of light on health through circadian regulation of sleep, depression, and cell cycle has not been directly studied in children.

Recommendation 2: To determine the potential and actual performance of a lighting system, the entire system should be assessed because the total performance cannot be effectively evaluated based solely on the source of illumination or on the individual components needed to create the entire lighting system.


Recommendation 3: For green schools in which the lighting strategy is to use daylight extensively, control systems that can be easily operated, such as manual blinds or other types of window treatments, should be specified in order to control excessive sunlight or glare.



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