Check your ppm and ph on your drain off the next time you water if your ppm is over 1000 the. You need to flush your holding salt ph should be 5.5-6.5 please post pics so i can see
Looks like your good with just the two but keep the plant within 4inch of the light so you don't have such a stretch if your trying to keep on the down low add two more lights when the plant get alittle bigger
I think you need alittle cal-mag about 4ml to a gal and maybe phosphorus so if your using a 3 part grow chemical I give it the bloom chemical and extra ml then i usally would and maby a flush later down the road
I have fresh cut clones ive grown a long time now but ive never taken a clone , I know that temps should be around 75-80 I just need to know whats the best humidity for them i have them under a dome and the humidity is at 99% is that ti high??