how long shouldnthe fans go for and what Quantum Board should i use😇https://horticulturelightinggroup.com/collections/all/products/hlg-65
You need to tell what size space it’s for. Bigger the space more lights needed to cover it. And you can ask multiple questions in one thread. No need to make separate ones. It’ll make it easier for you to keep track of the info you’re given in the future.
You are looking in the right place for lights. Trust what they say for recommended veg-flower area and match it to your space.