Quote Originally Posted by HiProGlow
Is it on the seed leaves or the first set of true leaves?
I'm trying to figure out photoshop in order to shrink the picture, so I may have to post it tomorrow

It's on the 1st true leaves, but it wasn't there when they first came out. The other two seedlings right next to it aren't affected, which is what confuses me. The center strip of the leaf, around the veins, is yellow- the edges of the leaves are still green. There is new growth- little tiny 2nd true leaves, so hopefully by moving the light 6 inches away, I have prevented more damage.

My 600W HPS lamp will be arriving Monday, and I sure don't want to torch my seedlings, so how far away should the new lamp be? The seedlings will be about two weeks old by Monday, and about 1 1/2 inches tall, with two sets of true leaves.
Thanks!