Replacing light-polluting
streetlights
Barret Williams is an amateur astronomer very much concerned with the
increasing light pollution in the area. He has been communicating with
AmerenUE regarding the installation of cutoff cobrahead lights
that direct light downward and screen emission upward. The primary advantages
of the cutoff design for most people, including AmerenUE are improved
direct illumination (less light wasted) and decreased glare. However,
the regular fixtures are cheaper to install because they require fewer
lights and poles (since they splatter the light around). AmerenUE reacts
to comments and encouragement from the general public, but particularly
pays attention to requests from its direct customers. So expressing support
for the replacement of regular-style fixtures with the cutoff fixtures
directly to the City Halls of your local townships could be a rewarding
effort by Astronomical Society members. Heres an excerpt from Barrys
message :
... Ameren is now offering "cutoff" cobrahead street lights
as a standard option. When I inquired recently about the utility's policy
on these lights, I was told by Jim Bradley (below) that Ameren favors
regular cobraheads because they spread light farther and therefore require
fewer lights and poles. However, he said Ameren will install cutoffs whenever
customers request them. Therefore, I hope you and other darksky advocates
in St. Louis will inform area cities of this option and urge them to request
cutoff luminaires from Ameren in the future. Jim Bradley is Ameren's lighting
engineer and can be reached at (314) 5542993. (Also via e-mail at jimbradley@ameren.com
) Please spread the word!"
Barry Williams
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