TMGraphics, I assume your wondering about using it for a large area? Well, if you lookat the scene file you will see that the light size is actually almost the size of the truck. The plane I used for that image was a infinate plane only because I didnt have to worry about a sky up above for that render. If you are using the light in the form I used you shouldnt have a need for more planes, just more lights where you want areas lit up. However, if you are going to do a landscape and want certain sections lit using thismethod then you wouldnt want to use an infinaite plane, rather a normal plane. In that case if you were using multiple planes I think this: I noticed using this lighting method that render times are more dependent on the objects the light is hitting rather than the light itself. For example, the truck took 8 hours to render. A cube or torus would take about 10 minutes, using the same exact lighting. Hope that answers your question.