the American Medical Association has even recommended that cities around the world stop using cool white LED's(high in blue light) for street lighting
yes the negative effects of blue light is that it disrupts the sleep cycle of residents, when using cooler and or brighter streetlights..
otoh, when trying not to fall asleep at the wheel, Blue Light helps keep drivers awake
so it depends whether you want to sleep or stay awake
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http://volt.org/lessons-learned-davis-ca-led-streetlight-retrofit/
the city made the decision to use Leotek 27-watt/
2,800 lumens fixtures with 4,000K CCT color temperature.
By May, negative public reaction to the conversion project precipitated a review
in October 2014, the decision was made to replace 650 of the already installed fixtures in residential areas and all remaining LED fixtures with Leotek 19-watt Green Cobra Jr., producing approximately
1800 lumens and 2,700K CCT.
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http://www.cnn.com/2016/06/21/health/led-streetlights-ama/index.html
In the case of
white LED light, it is estimated to be
five times more effective at suppressing melatonin at night than the high pressure sodium lamps (given the same light output) which have been the mainstay of street lighting for decades. Melatonin suppression is a marker of circadian disruption, which includes
disrupted sleep.
…
the AMA "encourage
the use of 3000K or lower lighting for outdoor installations such as roadways.
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For a driver interested in staying awake, it sounds like a "regular" Cool White LED flashlight might help... as it has tons of blue, apparently..