There was this library as a kid. Upstairs was warm and inviting and just a really nice library. It had this side hallway at the front entrance. At the end of the hall where metal steps that led to this dingy creepy basement. I went back there 15 years later when it was converted to an art gallery. Still creepy as fuck.
The red doesn't help. I think dim lights like that, of any color that isn't white or close to it, in a dark environment like that, give off kind of spooky vibes. It's likely the combination of all the things - the dark, the lights, the cold, and the relative quiet outside of the freezer units themselves running.
There's also the story of another security guard; an old man who's seen some shit in his day. I relieve him when I come in and he me when I get off on Saturday; he swears that one day, while checking the cooler areas in the back, he saw a ghost. Some of our co-workers who work back there also swear they saw the same thing, independent of him. And they all describe it as a woman in a blue dress.
Now, I don't believe in ghosts. But when I'm walking through there, and I come around a corner or look down an aisle I'm passing by, I sometimes get this feeling in my gut like something bad is gonna happen. It's my mind being paranoid and all that; it's playing tricks on me. But it's still creepy sometimes.
I personally think ghosts are the energy leftover from dying horribly. Hopefully people don't see your ghost there.
Do you think it is the red lights? Walking in the dark with red illumination only in a cold environment would get my hackles raised.