Yeah, they look like backwards white Upright Lockers with Nova Lights placed on top of them [because you can place stuff on top of lockers, don't you know !!] ...
Oh, good eyes, everyone. That does indeed appear to be what they are. Here's a picture of someone who did something similar with the upright lockers, for comparison.
Those are definitely backwards upright lockers. A lot of items can be used to look like other things when faced in another direction. It’s all perspective. I used lockers in this way myself.