Lightmare Australia A well-written discussion of the changes in lighting that have pushed us into a lightmare world. This article has many links to additional articles.
Fast Company – Is the marvel of LED lighting also a blight on global health?
Lighting in Architecture – Human Centric Lighting – The New X Factor?
Here is information about IEEE 1789, a standard for evaluating LED flicker. IEEE 1789
National Geographic – Light Pollution is Getting Worse This is an in-depth article about the impacts of light pollution. One recommendation is 10 foot poles instead of 25 foot poles.
Center for Victims of Torture – The Hidden Harm This pamphlet describes the torture technique called Sensory Overload. Torturers use bright lights, strobing lights, and/or loud sounds to terrorize victims. High energy blue wavelength LED lights and also strobing LED lights are both sources of torture.
Healthy Evening Residential Illumination This high quality article is written by a professor.
ZME Science – Human Eye Cells This article summarizes research about different types of eye cells, the speed at which they fire and how they communicate circadian rhythm information.
Jeremy Vine BBC Radio – Mr. Vine interviews experts and guests about blinding LED headlights. Play from 34:00 to 50:00.
Moon vs. 4000K LED This well written article clarifies why the color temperature and brightness of the moon is not at all the same as a 4000K LED street light.
Luminance Values – This is a list of luminance values at the eye (1 candela per square meter = 1 nit) based on our searches. This article on measuring luminance with a digital camera has list of luminance values. 1 Watt/cm2/steradian = 6,830,000 cd/m2 (nits), which is 1 Watt/m2/steradian = 683 cd/m2.
- Wilderness: Less than 1 nit
- Candle: 7 nits
- Neon: 8 nits
- Movie at a theater: 50 nits3
- Human comfort level: 300 nits
- Modern LED television: 500 nits
- Full moon: 2,500 nits
- LED billboard: 7,000 nits
- Human threshold: 50,000 nits
- LED streetlights: 500,000 nits (guesstimate)
- LED flashing lights: 1,000,000 nits (guesstimate)
- LED vehicle headlights: 100,000,000 nits1
- Xenon strobe: 1,000,000,000 nits
- Sun: 1,600,000,000 nits2
Streetlight Specs
| Vendor | Model | Lumens | Color Temperature | Watts | Lumens /Watt | CRI | BUG |
| Typical | High Pressure Sodium | 9,500 | 2000K | 100 | 95 | 25 | 1,2,1 |
| Typical | High Pressure Sodium | 30,000 | 2000K | 250 | 120 | 25 | 1,2,1 |
| Leotek | GC2-C LED | 25,400 | 5000K (unsafe) | 209 | 121 | 70 | 3,0,3 |
| Crossroads LED | ASTROPHILE:4000-EPH58-90-1900 | 9,437 | 1930K | 87 | 110 | 64 | 2,0,2 |
| Crossroads LED | ASTROPHILE:4000-PS1828-45-590 | 3,056 | 1600K | 48 | 64 | -25 | 1,0,1 |
| Crossroads LED | ASTROPHILE:4000-EPH58-100-1650 | 10,702 | 1650K | 97 | 110 | 55 | 2,0,2 |
Songs
If we listen to even recent songs, we can hear the references to starlight and moonlight. Now that starlight and moonlight are obliterated by artificial light, these songs reference a different era.
Under the Milky Way – The Church