That's a lot of plants for that space. Your going to run major growth issues after 5/6 weeks. I'd take half them out. In some cases less is more. And you'll probably get more from 4/5 plants rather than 8 tbh. But if you can pull it off with good results I'll be doing the same as I have similar setup, well the same but mine is spiderfarmer. Mars are just as good and use the same samsung light diodes. Will follow
Hey friend looking great, Super clean tent. I would like to offer some pointers to help out if that is okay? So cannabis plants love heat and humidity. The buds hate it, I would up those temps slightly to get more vigorous growth from your ladies. We want around 80-82 (84 MAX) with lights on and no more than 9 degrees less with lights off. If we expose our plants to large temperature swings at this stage it will cause them to stretch unwantedly. Also, humidity up to 70% for the first couple of weeks will really help supplement the smaller root structures with foliar intake from the humidity in the air. If you struggle to raise those numbers try adding a bucket of water to the room it will passively increase it pretty well especially in a warmer room. If you have not done so yet research VPD, Vapor pressure deficit, and how it relates to growing cannabis. It is something all new growers should learn right away, I see you got yourself some type of app for PAR on your phone that's good. I would recommend eventually getting a PAR meter like a apogee quatnum flux is the model I use and also a thermal laser temp gun to better read your plant's temps and grow to their needs. I use the fluke 62 MAX.
I also like to recommend sun grip light pulleys for the lights it really helps you move them around easily up and down very finite adjustments to get them right where you need them. If you have any questions feel free to ask I am always around to help out:) Keep up the great work friend, Check out my 200 light 7,000 plant diary & follow my profile!