ah that`s a bit tricky then yeah led seems your best option
I like leds with a down draft as the heat from the led panels is normally used by the plants but if it gets too hot you can vent the air out the top of the room or us an AC
depending on the leds you normally need between 400w and 800w of consumption to match a 600w hps for output but as you can aim leds better and get the plants closer some people can get a lot more out of the same area with the same power or less and some people are just able to get much more light into the same area
Looks like you could do with some bigger pots I normally use plastic bag pots for veg as they are cheap so you can cut them open to transfer if needed and you can get 100`s into an envelope in the post
For bloom or hotter temps in veg I like fabric sack pots or bag pots as they seem to cool the root zone and let some air get to the roots
also they fold up nice and you can dump them in the washing machine
30L to 60L is pretty nice you can flower a 3 to 6zip plant and never have to water more than twice a week 60L+ pots you can easy grow well over 10oz plants if you want to too just the bigger you go the more often they need watering, lol
but out the 100 to 400L sacks, lol
Well bud, like you I too use fabric pots, I was gonna transplant the small ones in 15-20L f pots but:
The Holy Grail was a friend's, he wanted to grow it in the back yard and after 2 months he gave it to me to flower.
The smaller plants are Dinafem Critical Jack. I have 10, 5 on the balcony. They were supposed to grow in another home, I was helping a guy. We were gonna split the 10 after 2 months of veg ... he gave up on me...
I will install, in the spring a normal AC, the mobile AC is too much electricity 1250w...
Thanks for stopping on my thread man!