Viewing Sunlight* In the morning: elevates energy & shifts to-sleep time earlier In th

Well SupportedViewing bright light in the 2-3 hours after the temperature minimum will advance the circadian clock, shifting wake-up and sleep times earlier.

Well SupportedMorning sunlight organizes the body's energy timing throughout the day, improving the ability to handle unanticipated demands.

Partially SupportedGetting sunlight in the evening can help delay the circadian clock, preventing early morning awakenings.

Partially SupportedViewing sunlight in the middle of the day elevates testosterone.

Viewing Sunlight* In the morning: elevates energy &amp; shifts to-sleep time earlier In th

Viewing Sunlight* In the morning: elevates energy & shifts to-sleep time earlier In th