I have x4 qb132 for my veg tent doing 60w ea on a 240w 3500k 561c and they are lovely for veg and bloom I've used them for both..Also hlg told me you will have a smaller yield with the 3500k over the 2700k but better quality buds so train your plants and make up the diff with super crop and scrog th...

I have a 2x2 tent and a spare cabinet that I would love to do your testing for you. I am disabled so I have lots of Time to do testing and do it the right way thankyou.

Hlg has a 100w board now it's on the last page they have a heatsink thats like a cob...but if I was you I'd get another 135w and call it a day it's always better to have more power and turn it down than not enough like you have now

I have x4 qb132s 3500k as well but I am running in series as it is safer on if you have board failure you wont have thermal runaway and can damage the other boards so series is thee way to grow...I am running the HLG-240H-C1750a driver as well for all 4 and it works great I have it running at full p...