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June 23rd, 2016 
Awake Goy
Doctors Issue Warning About LED Streetlights
June 22nd, 2016
Why not just use warmer LEDs? I don’t know about higher output units, but I’ve replaced all of my bulbs with 10 watt LEDs that are 2700k and they’re great. They cost only NZ$9.99 each. Are high output/warm LED units more expensive than cool ones?
I’ve seen some of these cool spectrum LED street lamps in NZ and they look like hell.
Via: CNN:
The American Medical Association (AMA) has just adopted an official policy statement about street lighting: cool it and dim it.
The statement, adopted unanimously at the AMA’s annual meeting in Chicago on June 14, comes in response to the rise of new LED street lighting sweeping the country. An AMA committee issued guidelines on how communities can choose LED streetlights to “minimize potential harmful human health and environmental effects.”
Municipalities are replacing existing streetlights with efficient and long-lasting LEDs to save money on energy and maintenance. Although the streetlights are delivering these benefits, the AMA’s stance reflects how important proper design of new technologies is and the close connection between light and human health.
The AMA’s statement recommends that outdoor lighting at night, particularly street lighting, should have a color temperature of no greater than 3000 Kelvin (K). Color temperature (CT) is a measure of the spectral content of light from a source; how much blue, green, yellow and red there is in it. A higher CT rating generally means greater blue content, and the whiter the light appears.
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