Daylight Benefits(Day lighting, Efficiency, and Productivity)
Daylight improves concentration so that working environments, be they factories or offices with natural light, tend to achieve increased productivity. Research into retail environments suggests that in many situations sales tend to be better in naturally lit locations; colors are more vivid and true, making goods appear attractive and encouraging customers to spend more time in these areas.
The two primary reasons for using daylight to meet the illumination requirements of an architectural space are the psychological benefits and the energy savings benefits. Good daylighting has been shown to improve the overall attitude, satisfaction and well being of building occupants. A number of research studies, a few of which are listed below, have shown a variety of benefits of daylighting in different building types and functions, among them improved retail sales in big box stores, increased worker productivity and reduced absenteeism in office buildings, improved student educational performance in K?12 schools, and improved patient recovery times in hospitals.
Exposure to daylight has also been shown to improve general health and circadian rhythm. These psychological benefits can easily justify any extra design effort or added expense associated with introducing controlled daylight into buildings.
Day lighting has been touted for its many aesthetic and health benefits by designers and researchers alike. Scientists at the Lighting Research Center (LRC), in Troy, N.Y., have?reported?that daylight environments increase occupant productivity and comfort, and provide the mental and visual stimulation necessary to regulate human circadian rhythms.
In a 1999 study???Daylighting in Schools: An Investigation into the Relationship between Daylighting and Human Performance,??commissioned by the Pacific Gas and Electric Company, HMG found a high correlation between schools that reported improvements in student test scores?upwards of 10 percent?and those that reported increased daylight in the classroom.