Green Crack under a QB288 in a 2x2x3

The Distance sounds right, you can control it the way your plant grows.if the next nodes are vry close together, and your girls are " dwarfing" then you got to rise the light. if they start to look leggy , you should lower the light. And if you are no near, your girls get a lightburn, leaves bleaching out. for me it looks atm the right distance, but you see them eery day. and droopy might be from to much water. I dont know how much your Girls get but more than 50 ml per day is the amount of what the Girls need atm... for mor questions feel free to ask me

Hey there looks like overwatering to me , you can tell by the puffy space between the veins of the plants , the overwatering is causing stress which is making the plant move nutrients from the leaves instead of taking them from the soil. For you size pot you want to water 1 to 1.5 L every three days to avoid stressing the plant with overwatering. Anyway hope this helps ! 🚀