Small buds for week 6?

Hey so this is my second grow and things haven’t gone as smoothly as I wanted it too. I had a 345w light that started all 5 plants, for about the first week of their life when the power brick failed and the plants experienced almost a full week of darkness at week 2. Not having the money at the time I had no option but to buy a $80 “1500W” light of Amazon I’m pretty sure it’s like Hydrostar or something like that I’d have to check. Anyways the led worked much better than I expected for the rest of veg, all 5 plants looked good in size and health wise before flower. They’re in 7 gal cloth pots with fox farm ocean forest soil. Currently I’m watering a gallon a day between all five plants. For nuts we’re rocking PH perfect Sensi growth A + B using 3ml of both per gallon. When it comes to temps it’s about 70 degrees F when the lights on I have a little heater in there aswell with a RH of 50%. I have a singular hurricane 10inch fan for an intake and another 10 inch for the exhaust. Planning on improving the air circulation system before the next grow but from what I can see it’s doing okay. Week 5 of flower came around and not a lot of weight has been added to any of the plants. A big concern of mine would be that I’m regrowing one of the strains that I grew my first time and the buds are no where near as big this time, even though the plant is in a bigger pot this grow. The tent is a 4x4x7. At the beginning of week 5 I ordered another led light thinking that may give it the actual boost it needed to grow but I can’t see much of a difference. When it comes to looks and smell they appear to be great, perfectly frosty good colors, but size is just lacking but I could be wrong. Any tips??? Ideas or criticism would be greatly appreciated. Strains are (2) cherry pie, (2) chocolopes, (1) green crack all from Seedbank.co