first grow ended up bad took off great good good foliage strong and 250w mh @ inches burnt yellow tainted the leaves smelt funny crispy 4 out of 3 dried up dieing one strong on survived. upgraded 2 a 400 hps son-t agro ballast and bulb. @ 12-16 inch on brand new well vegetated seedlings in rock wool the leaves are bending upwards got a 2nd chance at it lol lucky with a stronger light