For me there is no "subject". There are just 'things' in the photo. But nothing that my eye settles on and says 'okay, it's a photo of this'. It's just some random elements all in the same photo.
Perhaps getting a person in the photo, or some other 'point of interest' that you stare at longer than the other things.
My only other complaint is the far right most light. It's distracting and seems out of place. Perhaps hiding it behind the sculpture or even moving it outside the frame would help.