Here’s some clear and logical guidance on artificial lighting. Outdoor (paths and steps) lighting at MSATT is deliberately kept to a minimum and is red-tinted to simultaneously preserve the safety and dark adaptation of students and neighbours alike. We’ve also had trees planted* to help reduce the spread of unwanted lights (although the harsh conditions at Mount Stromlo killed off half a dozen saplings that now need replacement). Simple things can be done to preserve the night sky for our kids and adults alike without compromising safety.
https://darksky.org/…/guides-and…/lighting-principles/
*What’s the best time to plant a tree? Ten years ago. What’s the second best time to plant a tree? Today.