Mama M.
Great Question. Most of the times if natural light isn't coming through... You have to layer the light from natural, to general, to task lighting. That can be achieved several ways. Great idea for post.. Pictures and ideas will better explain what I mean...
 
Sandy,
Wow.. What a renovation.
 
Please don't let your husband paint their room gloss black.. My opinon on "THEMED ROOMS" are they aren't timeless. They only last for 2-3 years. It also depends if you are going to due to theme subtle or if you are going to go sport overboard. I think that you can do your little boys room in a very sophisticated by timeless manner that you don't have to switch every couple of years. What are there interest? Favorite Colors? I think the "Sports Theme" can be played in a very subtle way and then 2-3 years from now with a few changes it could be something totally different. If your looking for more suggestions on this, I can send some pictures or you can send me some information on your boy's space. I LOVE DESIGNING FOR CHILDREN.
 
Good question on the accent wall.. I'd put a color on the wall that if you are sitting on the couch you wouldn't stair at.. Maybe its the wall behind the couch or beside the couch depends on your particular space. When it comes to bedroom accent walls, you put the accent color on the wall that you want the focus (The wall the bed is on). I'm doing a post on color in the next few days so be looking for it.
 
Like I've told everyone I could help more actually having pictures or seeing a sketch of the space.
 
Hope this helps...