Why we never leave our outdoor lights on at night

Moths flock to lights left on at night, exhausting themselves to death or falling easy prey to bats. We leave ours off since there are already so many street lights in our neighborhood, but entomologist Doug Tallamy suggests using a motion activated light if you want an outdoor light. 
These are the bugs that were drawn to our light this evening while I finished up outside. They had huge antennae and were very cute. I also took a flashlight into the yard just to see what insects were active. It’s pretty interesting to see a whole new cast of characters at night.