Looks okay, it's possible to have too much light and actually inhibit the growth of your plant. That's about the only reason you would have a top Cola not as well developed as the lower branches. If you only have one light you may not be able to do much other than raise it up in preference of building all your top colas, but letting all your lower buds be kind of light and Airy. That's usually the Dilemma we Face anyway especially with autoflowers because you never know how big they're going to get.