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One of the disincentives against smarter control of street lighting is the near- or even below-cost electricity rates offered by power companies. Since it's so cheap, councils and other authorities leave lights blazing at full intensity and coverage all through the night instead of reducing intensity or shutting-down sections of lighting.

We astronomers in Northern Ireland were excited a couple of years ago when there was the prospect of lights being turned-off for five hours in the wee hours due to budget cuts, but unfortunately a new cheaper power contract was agreed with the suppliers.

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