Good street lighting is a H&S issue, but it can be done in a way that is not too intrusive. I have a happymemory of being on Lesvos during a powercut at night. Absolute pitch black darkness, no clouds, lying flat on my back watching the pin-prick lights tram-lining across the sky - satellite spotting. As I walk up Lordship Lane, I see the Light Pollution in East Dulwich and reflect on the relative merits of light and dark. ;-)