Artificial light scattered in the atmosphere creates skyglow. It reduces the contrast between faint stars and their background.
Outdoor lighting serves useful purposes. The question is how to direct it where it is needed while limiting unwanted light.
See what else you can discover.
Glare shines uncomfortably into the eye. Light trespass spills into an unintended space. Skyglow brightens the atmosphere above us.
A path, a sports field, and a bedroom window have different needs. Good questions start with the purpose of each light.
How could you compare star visibility without confusing the effects of clouds and lighting?
You do not need to have every answer. A good question is a great place to start.
