I love this app. I gladly paid $3.99 when I saw it, as I've been wanting something like this for awhile.

Question: any evidence of increased battery life due to the lowered brightness on a portion of the screen?

I was sitting in a dark room with my MBP at full brightness and noticed how bright the windows are when they're focused and you have the dim set sufficiently high. There's gotta be at least SOME savings, right?