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A2.5-7.2 Daylighting. Because residents benefit from the higher light levels and color associated with daylight, daylighting should be provided in resident living areas. The following are recommended:
  1. Windows and skylights should be used to minimize the need for artificial light and to allow residents, participants, and outpatients to experience the natural daylight cycle. High levels of light are required to entrain circadian rhythms and boost serotonin levels, reducing depression, the need for pain medication, and morbidity. While natural light is the best source for balancing circadian rhythms, artificial light can be used to stimulate the circadian system when natural light cannot be provided.
  2. In spaces where windows cannot provide higher light levels and/or where skylights are not practical, consider providing faux skylights with artificial light sources.
Dining, recreation/lounge, and activity areas for daytime use shall have glazing for daylight and views to the outdoors.
A2.5-7.2.1 Light shelves, diffused skylights, and other daylighting techniques may be used to balance the daylight in a space.
Translucent shades, sheers, blinds, or other window treatments shall be provided to control brightness and reduce glare.
A2.5-7.2.2 Glare or brightness from windows can reduce visual acuity or even disorient elders. Where windows are placed at the ends of corridors, the brightness of daylight and glare should be mitigated through building orientation or adjustable window coverings. Windows and shades that can be controlled by occupants and daylight-enhancing features such as atriums improve satisfaction, mood, and task performance.

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