Acuity / Lithonia also has Visual - the Basic version is free. The Pro version is $100. It reads data files from other brands as long as they are in IES std format. The Pro version shows contours for each fixture and for the layout as a whole, displays in 3D, can import backgrounds from AutoCAD and is a very good buy. We use it extensively. If you need even more power look at Lumen Micro from Lighting Technologies but it is $595.