Nami88, that's what I'm doing, and it's still not working well. I have three trees now, instead of 2. Which is nice.
I have a combined light level in this area of 170 or so.
I think I could fuel the sun with the amount of light energy put off in this room.
Oh, well, I'm now working on the checkerboard pattern, or chessboard, if you want to use that.
Torch, then a sapling, then a torch, etc.
http://img514.imageshack.us/f/grabby20.png/
Picture is worth a thousand words or so. So, what do you think about this?