So I'm fairly new to Houdini and Renderman in general. I'm now working on my second Houdini project and I'm interested in using some Renderman Light shaders. My basic question is, how/where do light shaders get implemented? My initial thought was that the shader would somehow be referenced by a spot that I created in the scene but that doesn't seem to be right. Secondly, through my readings of Renderman, most of the books talk about translating a light source by moving the coord system. I was assuming that was when you were rendering directly from a rib, not within houdini? Am I wrong? Do I really have to code the light's position to place it into my scene? Clarifications appreciated!