There’s doors to behind the shelves, they don’t just go back there when it’s empty and stock themselves in.
Where I’m from, the shelves are just tightly (efficiently) packed, and so you’re not seeing much back there. The lights are also presumably on timers, or at least a switch and you don’t leave it on if you’re not in there working. So it’s generally just a dark room behind it .
There’s doors to behind the shelves, they don’t just go back there when it’s empty and stock themselves in.
Where I’m from, the shelves are just tightly (efficiently) packed, and so you’re not seeing much back there. The lights are also presumably on timers, or at least a switch and you don’t leave it on if you’re not in there working. So it’s generally just a dark room behind it .