Don't worry about it, most people ignore those.
If I could be completely honest with you right now, I would suggest turning other bulbs off, and putting one, 23w CFL bulb, at 1" from the top.
Make sure you have a fan pointed at the plant to remove hot air, give it fresh Co2, and encourage stiff cellulose production.
Looks good, reminds me of how my second plant started out.
I had a bunch of lights on him like that, and he turned out like this;
See the super low, burned leaf? That was a leaf that was burned when he was about the same size as your little one.
The leaf will never recover, but simply be replaced.
I killed him when I found out he was a boy, but this one got to be about 12", with like 20+ branches tall, and 13-blade leaves.
Super dense, super high leaf count, nice shape. I wish I'd kept him around for his pollen.