Quote Originally Posted by stinkyattic
Volker you seem to have a heat or overfert problem. That isn't cosmetic damage.
Nope. Soory, that is not nute burn. That is from the tips of the leaves bapping into the CFL when they stretched. It is localized heat stress. It can only happen in CFL grows.

I wish you could look in the closet in person, you'd see the difference much clearer than mere photos can show: large, healthy plants with scarred leaves from bapping into the CFLs during the "stretch" phase of bud. Check out my tubgirls thread for detail on my battle with stretch.

The "curls" are from me adding sidelights. Since lights are now in all directions, different parts of some leaves will orient towards different bulbs. A very, very mild form of "hot spot", I guess. But again, merely cosmetic.