First grow

It's the first day of week 4 and they are looking good I am still hesitant of defoliation as I don't want to take too much off and not having much bud sights, so any advice on this would be very much appreciated. I do think they like where they are as they just keep growing everyday. I still have my bucket of 11 liters of water this should last me a week or two dependant on how thirsty my girls get. Also I have seen a lot of brown spotting on some of the leaves what does this mean? I will take a photo for you to see, is the brown spotting coming there because I am doing something wrong? Finally took the plunge at day 30 to do some proper defoliation and start some lst and I am glad that I read a lot of diary's on here and watched plenty of videos on YouTube this showed me that the process was easy and nothing to worry about. Also by doing this I have seen that my 2 auto amnesia have started to show signs of flowering, the auto white widow seems to be a little behind. It is still my first grow so I am learning as I go, they get watered every other day I found that they like the nutrition I have been given them, since I started with the feed they have grown a lot more, also during the week I moved my lights to 33 inches as we noticed that some of the leaves looked like they were being burned by the led. Well its the last day of week 4 and they are looking good I am so surprised at how quick and big they have grown in such a short time I have also learned that there is nothing to be scared of with defoliation and lst. originally I wasn't going to do any of that with my first grow but the leaves were so thick and blocking all the light to other leaves I just couldn't watch them fighting for the light anymore so took the plunge to try my best.