I didn't mean no offense bro, but that's a common misconception that's being spread around, for the most part my outdoor girls get rained on and then the sun comes out and all they do is dry out again, no spots...I foliar feed (sometimes) my indoor girls and with the lights on. The little droplets WILL NOT act as a magnifying glass (as I was told when I was a noob) and will dry as normal...if you have a chemical pesticide or strong foliar feed then YES do it at lights out...but otherwise I have found it doesn't do that...peace bro and we're all still learning no matter how much "time" we have put into this...