Our bodies have a natural rhythm, and, when we age, react to light in ways other than just for clarity of vision. This photobiological effect:
a) Requires significantly higher levels of both daylight and artificial light to help synchronize circadian rhythms.
b) Creates a need for up to 5 times lower light levels in aging adults to compensate for the aging eye.
c) Requires the need for large levels of both unfiltered daylight and natural direct lighting sources.
d) Calls for high levels of contrast between daylight and artificial light sources to prevent glare.