Woman in UK Complains LEDs Disturb Sleep
The American Medical Association, about one year ago, warned that circadian rhythm may be altered by LED streetlights above 3000 Degrees Kelvin Correlated Color Temperature (CCT). It is no wonder so many people are complaining that LED streetlights are disturbing their sleep. A UK woman is one of many inhabitants of plant earth that never even thought […]
Read More
CCT Not Useful for Selecting LED Streetlights
Rensselaer Polytechnic Institute’s Lighting Research Center (LRC) chimed in with respect to the American Medical Association’s recommendation to use Correlated Color Temperature (CCT) as a metric for selecting LED streetlights. According to the LRC, CCT does not tell the whole story. To predict the harm caused by LED streetlights, it is important to consider the […]
Read MoreSongbirds Exhibit Higher Stress Hormone Under White Streetlights
Free-living songbirds show increased stress hormone levels (corticosterone) when nesting under white street lights. But different light spectra may have different physiological effects as this study finds, suggesting that using street lights with specific color spectra may mitigate effects of light pollution on wildlife. Link to Article
Read More
Streetlights Appear to Have No Effect on Crime Rate
The International Dark Sky Association indicates that there is no clear scientific evidence that increased outdoor lighting deters crimes. It may make us feel safer, but has not been shown to make us safer. Link to Article PDF
Read More