Why are all my asset preview windows so dark?

I seem to have this problem on my home computer, but not on my work computer. Whenever I open an asset in a preview window the lighting is super dark:

But in properly lit levels, the assets are fine:

How do I make the lighting in my asset previews more reasonable?

After I asked my question, I found the exposure settings in some preview viewports. I disabled Auto, and cranked down the EV100:

When I set it low enough to be able to see, everything becomes a little blown out, and the shadows are pitch black, but at least this is usable. I’d love a less harsh solution. Also, not all viewports have these settings, for example, blueprints don’t have them, so those are still dark.