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Old 20-06-2021, 09:33 PM
Hans Tucker (Hans)
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Hans Tucker is offline
Join Date: Jul 2008
Location: Melbourne
Posts: 1,751
LPR (Light Pollution Reduction) filters

Advertisements for LPR (Light Pollution Reduction) filters claim they can drastically reduce the effects of light pollution. Block artificial light from Mercury Vapour Lamps and Sodium Vapour Lamps.

Do they have an effect, if any, in reducing the effects from street LED lights?
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