I'm not sure that we do need them, at least not to the extent that they're used. http://darksky.org/light-pollution/lighting-crime-and-safety/ http://darksky.o

I'm not sure that we do need them, at least not to the extent that they're used. http://darksky.org/light-pollution/lighting-crime-and-safety/ http://darksky.org/light-pollution/lighting-crime-and-safety...