I'm certain when the time and funds come along, you will be amazed at the increased available light when you put sheetrock on the ceiling and paint it white. It might even encourage you to insulate and sheetrock the walls. The lighting and comfort levels will be dramatically brighter.
I'll try and get pictures this evening of how ours looks with all the lights on. Since our country cadillac is residing in their, I'll pop the hood so you can see the amount of light it sheds there as well. I did build it with 10' ceilings, but can't begn to tell whether that would make the lighting better or worse.
Oddly enough, the two pictures with the lights in them don't appear quite as bright as reality and the underhood picture is a little brighter than reality from the camera flash.