Man Made Blue Light
THE BASICS
Humans and animals have not had much time to adapt to artificial light, we have only been used to sun, moon and fire light. The gas lamp being the earliest up until the last 200 years or so.
The spectrum of daylight varies throughout the day, whereas artificial lights stay the same all day and modern lights like the fluorescent and LED’s are high in the blue part of the spectrum. The reason blue is so dominant in todays lighting was originally to make people more alert in the workplace and the yellow to red part of the spectrum generates heat (Infra Red) which takes more energy. So since fluorescent lights were invented problems have started to arise.
As we can see above, exposure to daylight controls a lot of our biology as we have evolved to work with the sun’s changing frequencies, including UVA, UVB & Infra Red, these frequencies don’t exist in most modern lighting.
Combined with the negative effects of artificial light, the indoor existence creates further issues, so we must get outside for a light break as often as possible to reset your body clocks (more on this later).
The most critical issue with blue light is ALAN (Artificial Light At Night), including phones, tablets, computers, TV’s and LED lighting. This really disrupts your sleep and any good stuff you have done during the daytime.
Too much blue light and your body clock thinks it is lunch time.