Wendersnaven.com (a resource for nwn2 builders)

Nwn2toolset posted this great tutorial on using lights by Geethree. It covers shadows, lerp and some other great items that you might have missed on your first pass through the lighting options.

Check it out here:
http://www.nwn2toolset.dayjo.org/ToolsetTuts/blueprints/lights/light.html