3rd week is over and she is a little stunted growth wise but that’s because she was in a box with no heat. It was pretty cold the past 2 weeks. Anyways I moved her into the heated tent underneath some vicious COB LEDS and I can already see a difference!
You'll like the CXB3590s. What spectrum did you pick? I have a DIY 16 COB 800W fixture in my 5x5 with a mix of 3000Km 3500K and 4000K CXB3590s and every strain I've grown in there has loved it. Just be careful once the girls get tall. You can still bleach and burn things with 75W COBs.
Good luck with your grow.
Girls are looking good - the temps don't seem to have caused a problem. I added a silica supplement to mine in week 3 to help strengthen the stems based on the breeder's comments on potential need for support early on.