Thread: My geek thread
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Old 01-08-19, 11:19 AM
  #1704  
Ygduf
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Originally Posted by TMonk View Post
neat!
the orange sodium vapor lights emit a very narrow band of light that is more easily filtered out for the observatory. But don't worry, everyone is ******** so they are pushing for modern (white) LED and/or metal halide lights that emit light in all colors and can't be filtered out.

wah wah
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