This is a huge issue in my part of Canada right now. All those Cannabis greenhouse have illuminated the sky. I live north, away from the big cities and used to be able to see the night sky. Now, all I can see is orange and purple glows. Those greenhouses used to grow tomatoes without any issues, it's only since the shift in product that this started.

https://www.cbc.ca/news/technology/cannabis-greenhouses-ligh...