Just a little advice needed

Afternoon people , looking for some advice I've currently got 2 tents and wanna know if I'm over doing it in them I've had 2 spins off them previously and weren't really happy with the second outcome and wondered if I'm packing them with too many plants

1st tent is 1.4m x 1.4m - 2x600w
2nd tent is 2.4m x 1.4m - 2x600w and 1x1000w

Both times I have put 12 in the 1st and 18 in the 2nd and had very different results I've read on other forums that more plants doesn't always equal more bud and would like some advice

First time round I had 89.5oz and 67oz on the second

I use 10lt pots with canna soil and use all canna nutrients also following there phase chart e.g
Veg 3 weeks

Please people any help or pointers would handy for a bigger yield

How big are they getting in veg before you switching to bud?

I'm switching them after 4 weeks mate

They are around 2 and a half feet I'd say maybe slightly bigger , I just want to know should I lower the amount of plants per tent ? Veg longer depending on height of the strain I grow mostly cheese , Uk Exodus at the moment

depends if they are all the same strain and the variables all the same, nutes, soil, same tent set up, everything the same? from the research ive personally heard that 1.5meters/5ft youd want to use 1 1000 watt lamp, and for a 1.2 meter/ 4ft 1 600 watt lamp. it seems like youre getting decent results, so the only other thing i could think of is if you had so many plants that they blocked the light out from the lower half of everything in the tent?

That's what I was thinking , should I top these and only have a canopy ? As the bottom parts in all fairness don't produce big buds at all ?

i was thinking since you did considerably more with 12, maybe revert back to that?

do 4 plants man with lst in bigger pots just a little somthing to thing about friends has a 1.4x1.4 he has 2 plant in 30 ltr pots but has hole cut in the tent and the tent raised up so the pot are out side the tent plants in runs 2 600 watt cool tube system but with dutch master coco last pull thing he got about 6 p

forgot to mention he has them beer brewing straps set at 20c wrapped around the pots

I have 30 in total , 12 in the small tent and 18 in the bigger tent .. You honestly think by having 2 plants in each in 30ltr pots I'm going to yield more then 89.5oz I find that hard to believe

I don't have the height remember aswell so I can't let them get like 7ft I have 5ft MAX!!!

u could maybe go vertical by chopping hole in roof and floor run 2 600 watt in cools tubes straight up and down have ur plants around it in the tent just another idea