I actually think that Beacon plays better in the dark. When we were camping, we played at night and it was pretty dark. In addition to the central Coleman lantern, I just used a little LED reading light clipped onto my GM screen so I could see my notes. The players either used a quick shot from a flash light or leaned a bit into the lantern light to reference or update their character sheets. All their dice were from a shared pool that they rolled in that circle of lantern light.
It totally rocked.