Shouldn’t the new LED streetlights be shielded so that drivers cannot see the source of light?
No, the new lights, which have been certified by the International Dark Sky Association to be a fully-shielded, full-cutoff fixture, are designed to provide a smooth transition from the brightest area of light directly under a lamp to the dimmest area between lamps. Adding extra shielding to prevent light from shining up and down the street would result in sharp transitions from bright areas to dark areas along the road. This would inhibit drivers and pedestrians located under the streetlight from clearly seeing cars and people located in the darker areas of the road. The source of light in an LED streetlight is directed downward enough to avoid causing drivers from experiencing disability glare from the light.

Show All Answers

1. What is the entire scope of the conversion program?
2. How will this conversion effect the city’s energy use and budget for streetlights?
3. What other benefits are there in an LED conversion?
4. What is an LED?
5. What type of streetlights did the LED streetlights replace?
6. What does color temperature mean?
7. Hasn't the American Medical Association (AMA) raised health concerns about LED streetlights?"
8. Shouldn’t the new LED streetlights be shielded so that drivers cannot see the source of light?
9. Will new LED streetlights produce unwanted spill light?
10. How do I report an LED outage or request a house shield?
11. Does the City use LEDs for any other fixtures currently?
12. How did the City determine streetlight wattages and brightness levels?
13. Did the City consider a wireless control system that would allow dimming of the streetlights?
14. Have the LED streetlights resulted in higher levels of blue light?
15. Is there a connection between LED streetlights and circadian sleep cycles?
16. What other Massachusetts municipalities have converted streetlights to LED?