> People need light to see in cities. This light serves a function. Street lights with (full) cutoff will still provide light for people: * https://www.blanco

> People need light to see in cities. This light serves a function. Street lights with (full) cutoff will still provide light for people: * https://www.blancocountynightsky.org/guidelines.php https://www.blancocountynightsky.org/guidelines.php * https://highways.dot.gov/safety/other/visibility/fhwa-lighting-handbook-august-2012/5-considerations-concerning-lighting https://highways.dot.gov/safety/other/visibility/fhwa-lighti... * https://www.zgsm-china.com/blog/light-distribution-of-outdoor-luminaire-and-their-applications.html https://www.zgsm-china.com/blog/light-distribution-of-outdoo... In fact it will improve the situations as all the light will be directed down, and so you'll need fewer lumens/lux/candela since half won't be waste going up (saving electricity), less glare on the roads after rain, and folks won't have street light blasting through their windows.