You'll be fine. Fluorescent lights have UV but it's not that intense. Weeks in it might be a problem, hours won't be.
I routinely brew and siphon under fluorescent lamps, next to a window, because I have no alternative. This means I'm passing very thin streams of beer, exposing it to a lot of ambient light. A few minutes of that is probably equivalent to hours of exposure in a bulk container.
Don't worry about it. Do your best to prevent exposure, but you don't have to be paranoid.