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I thought the wider spectrum of light coming from LED streetlamps means they can be run at a lower brightness to provide the same visibility, which means less overall light pollution (less reflection back upwards) and less power usage.

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The little wild creatures don't appreciate that visibility. If the recent report on biodiversity loss bothered you, avoiding LED outdoor lighting is one easy action to take locally.

There's not a lot of biodiversity on the streets anyways, so that's not a big deal. but the little wild creatures do appreciate less light in the woods, which is what you get from less light pollution.

The light polution glow from cities can be seen from about 100 miles or so, so it's not a localized problem.

How does this compare to a full moon?

I assume animals have evolved to deal with that.

Not all month long. They've found that frogs won't sing if it's too light, making it hard to woo a reproductive partner.

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