are those bulbs not just a little close to those leaves? i had somewhat of a similar grow going at my old place and i found the leaves were browning because the bulbs were a bit too close just watch out for it.
try 20x last time i got 40 and you trake a full bowl in a pipe and hit the vortex hole each time and thats not fun unless you like to panik but id say give it a try at least once
METAAAAAL had to come back home and catch some tunes just dropped some bogus acid, normally id just search the streets for that little punk and take my money but hes probably already spent it oncrack