Replied "There is no clear evidence that increased outdoor lighting deters crimes. It may make us feel safer, but has not been shown to make us safer. Most property crime occurs in the light of the day. Some crimes like vandalism and graffiti actually thrive on night lighting.
https://www.darksky.org/
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Commented "I have one porch light that is turned on once it’s dark and turned off once I go to bed. It’s only on for a few hours. Light pollution has direct and negative effects on energy consumption, human health, disruption to the ecosystem and wildlife, and even crime and safety."