What you can do to reduce light pollution
LA TimesA northern starscape can be seen behind silhouettes of cedar trees at Cedar Breaks National Monument in Utah. Urban light pollution is a large-scale issue, but individual households can help their communities turn down the lumens while still ensuring safety. She’s a member of the International Dark-Sky Assn.’s technical committee, and she offered this advice to reduce light pollution in your neighborhood: Install time and motion sensors The best way to reduce light pollution is to turn lights off completely when they’re not needed. Choose warmer colors Light bulbs with warmer or yellower tones are more suited to our circadian rhythm than bluer light — that’s why the “night” mode on your smartphone uses them. Instead, choose bulbs with temperatures lower than 3000 K. Shield all external lights A safety light by the door does not need to illuminate a tree.
History of this topic
Project dimming Canberra's street lights shows 25 per cent reduction in light pollution
ABC
How light pollution disrupts plants' senses
BBC
Night skies are getting clearer as rising energy costs keep light pollution down, charity says
The Independent
UK light pollution levels significantly reduced during lockdown, nationwide star count reveals
The Independent
‘Lights at Coastal Road work site a major source of pollution’: Study
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