Hmmm. Thanks for your suggestions but let me do some more explaining and then get back to me. Each hut is only 3.5ftx3.5ftx7
I dont think much would come from the light being moved 2 inches each way.

Each hut us in oppisite of itself.
One hut is on from 4 in the morning until 4 in the afternoon. At that time a my flop is engaged and the other hut turns on. One Ballast running 24 hours,= 2 rooms at 12/12 and cheaper at least in my area.