Nice, for a budget grow, I like. a couple suggestions.

yea dont prune these guys, they would need much more green growth

you need a fan in there, to blow some air around this will, make the stems stronger.
also if you hang you lights from above, they will emit more usable light. or you could get a couple sidways light adapters for a few bucks

cheap cake/ buffet pans from your local grocery store work well as reflectors, for a few bucks. also cheap

but typically weed can nearly grow in any condition

keep it up. lookin good