thanks, I realised the screen was a little higher than I thought so I put 1/2 an inch of books under them, probly pointless but I'm too fukin impatient lol. Now the measurements I gave are correct. Anyway, I got my first top coming through the screen yesterday, roughly how long do you think it might take to fill 50%? just an estimate as I have no clue whatsoever. I was planning on lollipopping but only when there is practically no light penetration below the canopy as my temps do get a little bit high sometimes (not too much) and these are very bushy plants so I want to reduce risks of mold, do you think it's a good idea or will it stunt growth? (by lollipopping you meant trimming lower leaves?)