In space we get the option of setting the lighting levels, but we don't on the ground or interior maps. In particular this makes it very difficult to light custom interior maps (made on a ground mission base) because we don't have an appropriate lighting option. We need to be able to set the ambient light level, among other things to prevent objects from being too dark.

I definitely would like seeing this feature added. Being able to create the right ambiance is essential to having the right feel for a mission.