^^ Ya that thing looks hellas heat stressed, and burnt. Rig up a Box with plenty of room, and use that light, maybe + 1-42w CFL Too.

Keep the lights at least 10 inches or so away from the leaves. maybe 8-9 in your case.

The yellowing. is like stated above, Burnt, or heat stresed. She should be fine when its in a bigger box with the lights off the leaves.