It looks like they're growing to me. You might try the same thing with your light as you do your nutes. Move it a little closer very gradually, until you see signs of heat stress, then move it back a notch and keep it that far away. I think I have my 600W that far away, but I'm using a cool tube and a small fan blowing up at the light.

The best way to tell is by measuring leaf temp with a laser thermometer, and keep it under 80. But there goes another $30-60.