[throw0101a]

Depends on the settings. Limiting it between midnight and 4 or 5, when there's probably the fewest number of people awake, would be one way to minimize switching.

Whether it's a fast on-off or gradual would also probably determine how disruptive it would be.

This would also be done mostly in low-traffic areas, and that'd be relatively easy to determine because you'd have motion sensors to measure things. Heuristics could be determined to see traffic patterns: more people are likely to be out late on Friday and Saturday nights than on a random Tuesday at 0300.

One experiment found an 80% reduction in electrical use:

* https://newatlas.com/motion-sensing-streetlight-system/19199...

At the very least a system like this could perhaps be done for parking lots, which generally see little activity in the middle of the night. There's a lot of empty asphalt being lit up now.