How to See the Light (and Still Drift off)

The blue part of the light spectrum boost mood and energy during daytime but can throw off your circardian clock in the hours leading up to bedtime. Most of us are getting more blue - light exposure than ever beacuse of smartphones, laptops and LED light, which are bluer than their less energy - efficient predecessors. You could cut down on late - day screen time, but if that's not realistic, try wearing amber - tinted glasses in the evening, as a recent Columbia University Medical Center study of insomia sufferers suggets.