My room dimensions are 24 x 20 x 7. It is virtually identical looking to Mojo's (if you continue the back wall straight across where the ping-pong table is). Stairs are in the same place, and support beam. I don't know if this is relevant to adding or lowering brightness in a room, but my walls are just recently insulated to R30. Also I have a very thick commercial carpet (for my wheelchair) with a under pad.
Oh yes, a good reason not to become handicapped is that you'll have to dish out a fortune for carpet because companies don't warranty a residential carpet for wheelchair use. Over $2000 in carpeting just for that room.
