The mighty wash leaves a pretty good "leaf shine". I have seen some people say they use under lights but I wouldn't do that. I spray 15 minutes before the lights go off if in flower and rinse with water when the lights come on. The same company sells an after rinse but I have never used it. Late flower is a little more scary. This stuff blows heads off of trichomes, but that could be because of the atomizer I use. I typically try to kill anything before that stage of the game but if a person is struggling with mights that late in, this stuff does work and the people that sell it say you can drink it. I have seen reports of some people saving gardens that were fully tented out. Otherwise I use it for spot treatments if I see breakouts. All in all I haven't seen it hurt plants in a manner that would deter me from using it. In Denver I'm spending around $100 on 5 gallons. Cheers bro, hope that helps.