The introduction of blue lights on train platforms in metro Japan resulted in an 84% decrease in the number of suicides.
NASA uses blue light to wake up Astronauts before take off and now they have lights on the International Space Station that emit three types of daylight.
A new study has found that chronic disruption of one of the most basic circadian (daily) rhythms — the day/night cycle — leads to weight gain, impulsivity, slower thinking, and other physiological and behavioural changes in mice, similar to those observed in people who experience shift work or jet lag. (https://www.sciencedaily.com/releases/2009/10/091026225744.htm)
PTSD’s biggest impact is on sleep, resulting in an out of whack circadian rhythm. Doctors are recommending PTSD sufferers increase their sun intake. Sunlight assists with balancing the circadian rhythm and thus improves the consistency of sleep. Some doctors also recommend it for reducing dependency on medications. Holy begouzers – more daylight?? That simple?
OK, so I will mention agricultural lighting. Development in this area is focused on light recipes that improve yield and flavour of vegetables and plants. This will likely do well – but unless they are in a complete and whole environment, like they would be if they were growing in nature, they cannot possibly yield the full flavour and richness.
Much the same for people, our nutritional sources are varied and changing, season by season and year on year and let’s not forget the impact that happiness has on our physiology, this includes art, music, literature, nature, film.
So, Human Centric Lighting is not a replacement for the sun, but it certainly reduces the negative impact of spending 90% of our time indoors. In the meantime, sunlight is free and requires opening a door to access — use it, it could hold the key to solving many, many health challenges.