how long should i vegg my plants? in a small room?

my tent size is 30 inches wide 30 inches deep and 63 inches tall and i got 12 kush seedlings 6 inches tall in party cups with a 2.5 week vegg, with 3-4 alternating true leaf nodes. will repott them into 1 gallon pots that should pack the area wall by wall. im using 600 watts by the way. how long should i vegg and how tall should they be? i want max yields so no pruning topping or low stress training.

that space seems small for 12 plant an they will double if not more in size
from wen u flick to 12\12

Yeah might be a good idea to do it now. Plants can get 10X larger it just depends. If you have 12 then the pots are small as well so you dont want them getting all that big with no root mass.
I bet if you veg now they would end up at least 20" tall from the soil. Probly taller. The taller they get in veg the bushier as well.

You should only have 4 to 6 in that room you would have a good outcome with those #'s

about a foot high, with 3-4 nodes. then the plant might get to about 2.5-3 feet. indicas don't grow tall, just wide, so maybe fewer plants?

im using LEDs and indica genes so stretch will never be an issue but the growing wide will, unfortuately I have done a few outdoor grows with this strain, untopped and pruned and un LST it will grow into a single cola with small branches on the bottom, looks like a heavy sword. How many 1 gallon pots should I have in my space? also how much longer should i vegg once I repott? I plan on flowering in 10 days or so marking the 1 month vegg in party cups.

i would switch now, or you gonna run out of room rapid!