Do you have a fan blowing directly on them?

If so, I know that can cause leaf damage simply by drying them out.

Try bouncing the air movement around instead of having it directly on the plants. :jointsmile:
BobBong Reviewed by BobBong on . Dry leaves, vegetation state What is your experience level? (first timer, novice, experienced...) First timer Your Equipment: .1) Type and wattage of lights. (MH, HPS, CFL's, tube fluorescents, LED's) HPS 150 watt .2) Distance from tops? just about 24'' .3) Reflector type? (cool tube set-up, bat wing, enclosed reflector, bare bulb...) Build-in Ballast (sun sytem 150 watts) .4) Is there a consistent fresh air supply? yes plenty .5) Do you have an exhaust fan and a circulation fan? yep, both of 'em .6) What are the Rating: 5