. . . it changes throughout the day.
. . . Our bodies are attuned to this Circadian rhythm.
"multiple physiological processes—including those relating to:
. . . . . . alertness,
. . . . . . digestion, and
. . . . . . sleep—are regulated in part by,
. . . the variance, and interplay of hormones involved in this cycle."
Solros, (from Sweden)
. . . created a system that harvests sunshine with a mirror dish,
. . . (put on a roof or other exposed area) and
. . . distributes the daylight to rooms without windows.
The technique has existed for a while,
. . . but, this is the first consumer product out there.
5-4-2018 Source: Let there be #Light