Cause: Those min() and max() were being called unnecessarily and were skewing the sd_lumcount values.
Rebalanced darkness a little.
Possible issues: Lights seem to have a longer range now. which could possibly explain the increased cpu use of sd_lighting recently.
git-svn-id: http://tgstation13.googlecode.com/svn/trunk@4356 316c924e-a436-60f5-8080-3fe189b3f50e