I get what you're saying, not having completely dark maps and all, but not when it comes to Catacombs. It is a hard map yes, and some areas are pitch black, BUT it's really not that hard making out where you need to go. They've done a fine job on collisions so you don't get stuck or blocked while running through the dark. Never expect to survive in the first try.
The map I'm working on (my very first) will be set in an underground lab much like BioticsLab, but some areas will have some actual skylights in the ceiling, so these areas will be naturally lit, and where you might end up fending off the zeds in the end. Then I will also have the (other) skylight lighting on about 2-5% so you can still make out some of the areas, even when all the lights are completely destroyed. I might also have some of the lights not completely destructible, but just flinkering, and some spinning red 'alert-lights' which are not destructible.