Yes, I agree with gmslave, neem on such baby plants is a bit rough. Definitely stick to 18/6, plants do need to "sleep" and 24 hour light will just mess with their genetics, nowhere in their life has cannabis or any other plant evolved under 24 hour light. I dare say they are stressed from the 24 hour light. Try not to overfeed them, plants of that size and age need surprisingly little feeding. I am sure now that they have a more normal lighting schedule, they will pick up soon enough. Just remember, "good things come to those who wait" and so it is with plants, they need time, nurturing and patience, they are not machines to be run at full speed their whole lives. Hope this helps,... Organoman.