Why is the area to the right of your sign empty ?? Do you share that sign with someone ?? If not, why not use the whole thing ??
He's right about the layout. Regardless if you originally designed it, or someone else did...... that is rather bad looking. No nice words to say about that.
It looks like one of those 4" cabinets, massed produced back in the 60s and 70s which requires a pan face. Someone got cheap and put a flat face in and that's why you're experiencing what is called Hot Spots. Seeing the lamps at night. LEDs in that cabinet will proably work, but a pan face would be a good idea, also?