In 1989, scientists demonstrated that carefully timed bright light can reset the body's biological clock. Years later, it produced breakthroughs in treating jet lag, insomnia, shift-work disorder and disrupted sleep

In 1989, scientists proved bright light therapy resets your biological clock. It changed sleep medicine overnight. Timed light exposure shuts down melatonin and resets your circadian rhythm fast. Whether you suffer from insomnia, jet lag, or shift-work sleep disorder, timing is everything. The secret isn't more sleep. It is getting the right light at the right time.

Raccontata daeconomictimes.indiatimes.com