Nighttime exposure to the blue light emitted from screens – such as your TV, computer and ‘phone – disrupts our sleep hormones, reducing sleep duration and disrupting sleep.
- f.lux app @ f.lux makes the colour of your computer’s display adapt to the time of day, warm at night and like sunlight during the day
- How Light Affects Our Sleep @ Mark’s Daily Apple: Primal Living in the Modern World
Excerpt: Blue light regulates our secretion of melatonin, the sleep hormone. Exposed to blue light, we limit the production of melatonin, and we stay alert and awake; in the absence of blue light, melatonin production ramps up, and we get sleepy.