Corals growing toward light source

[A.G]

Helloo every one,

In my 33g g lighted with a single 150w MH phoenix and about 4" above water surface. I noticed that all sps corals on the right and left side are growing towards the middle.However, the whole tank bright and well lit. Its not am complaining I just wanted the to grow UP wards.
Any ideas?

 

[A.G]

Here is an example showing two corals are growing to the left !!

a picture showing the tank

 

[Whisperer]

Since you rock is higher on the right, move your light a little to the right.