Dimming lights for the 1-2hrs prior to sleep = significantly longer natural melatonin prod

Well SupportedViewing sunlight around sunset can adjust the eyes' sensitivity to artificial lights later at night without disrupting the circadian clock.

Well SupportedDim lights in the evening combined with a slightly advanced melatonin dose can help advance the natural rise of melatonin and facilitate sleep.

Well SupportedBrief exposure (15 seconds) to bright light in the middle of the night can significantly shift the circadian clock.

Partially SupportedIt is advisable to use dim lights at night, while prioritizing safety.