Show Light Cone

Nice post from Mike Hardy-Brown's blog...

http://reviteer.blogspot.com/2008/07/revit-arch-2009-lights.html

Neat little trick with lights.
Instead of rendering to see where your light source definition will render lit portions, go to your visibility graphics (VG), show the lights on in shaded or hidden line views. Switch on Light Source. Also nice to have an override here. I used a blue overhead line. Sectional Elevation representation of light source definition.