Help with Level Lighting

I’m working on a space station setting, where we’re using Post Processing to give a low-poly/pixilated look. I’m trying to avoid using Lumen to save on performance, but for the life of me, I just can’t seem to get the lighting right. My lights are fairly simple. They’re stationary and can be turned off and on via a light switch (that all works just fine). The issue is that it just looks really bad. There was artifacting in the shadows at one point, so I turned that off, tried lowering the attenuation radius because they were overlapping and causing errors, but now the light is hyper-focused and doesn’t spread the way I want it (in the screenshot, you can see the ceilings are pitch black). I’ve watched I don’t know how many tutorials on lighting, but they are all focused on high fidelity lighting, and I’m going more for a lethal company vibe, but with a slightly higher focus on light being important.

If anyone has any tips on what I should be doing, settings, light types, or a video that covers this that I just haven’t run across yet, I’d be very grateful.