Science can inform better lighting decisions

Dunedin has an opportunity to become the first Night Sky City in the southern hemisphere,  but the success of this visionary endeavour hinges upon one important factor: night sky-friendly streetlights. Unfortunately, there’s confusion about what’s involved. Lighting is a  complex issue.  White LEDs are  being heavily promoted for their energy efficiency, they have other costs, which outweigh energy, maintenance and operational savings. The implications are serious  because LED technology is rapidly being installed around the world.