The American Medical Association issued a warning in June that high-intensity LED streetlights — such as those in Seattle, Los Angeles, New York, Houston and elsewhere — emit unseen blue light that can disturb sleep rhythms and possibly increase the risk of serious health conditions, including cancer and cardiovascular disease.According to Ollove, nearly 13 percent of roadway lighting now use LED lights, with many more plans planning to switch to the technology in the near future, so the AMA's report applies to a huge swath of the country.
And that's not the only concern. "The AMA also cautioned that those light-emitting-diode lights can impair nighttime driving vision," adds Ollove.
The good news is that the AMA does approve of lower-intensity version of the bulbs. New York City, for example, has switched to a lower-intensity version of LED lights in efforts to retrofit its streetlights.