<quote>Interesting system on Isle of Man as ianh describes by having an off period of the streetlights between 1 a.m. and 6 a.m.
Is power here diesel generated??

Before 2000 the island relied on diesel, but we now have an AC interconnector to the UK and a new CCGT plant.

<quote> How does that work out with crime and the likes? We have found in NZ when streetlights fail, the crime rate like grafitti etc increases. especially over a longer period.

The streetlights stay on in the main town on the island which is where any vandalism would be expected. The island thankfully has a very low crime rate, and vandalism of any sort outside of our main town is very rare.