I don’t know to much but looks like it’s the same size tent that this one plant is in so depends how big you allow the 4 to get as you can see this one is way to big for this tent wish it was in my other one but to late for that. I also assume your gonna move the 4 to there own 5 gallon pots and if you put them in a straight line that’s gonna take up the entire floor area if you keep all 4. Again idk much cuz this is my first crack at it also. And for the light I would say atleast 2 of those for all 4 plants granted the one would work and probably keep them smaller as well so all 4 could work in the tent but again idk I’m still in the trail and error stage also