Hi, MM: Sketchup heretofore does not do lights, or caustics. It is not a rendering program. You could create a material/texture from a picture of a blazing light bulb, but it would not impart any effect on the surroundings. You mentioned Kerkythea and Light Up which are both good rendering programs. Look at this forum page: http://sketchucation.com/forums/viewtopic.php?f=81&t=3220#p15472 Maybe one of those?