Most of ours have been turned off 00:00 to 05:00 (GMT) since April including, I'm pleased to say, two that shine into my garden and another that shines into my bedroom window. The only ones left on are on main roads and junctions, and at crime hotspots (where the existing lights are clearly doing a lot of good [not]).
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Criminals are pretty keen on street lights being switched off at night.
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No, criminals are pretty keen on houses being empty or occupants being asleep, and doors and windows open or poorly locked, at any time of day or night. In areas where lights are switched off at night crime is generally seen to fall. In our brightly lit towns and cities criminals can work at night under taxpayer funded, council maintained worklights streetlights.