Hi, I am calculating the impact of an obstruction on Lighting Energy (LE) on the second floor of a residential building. I have attached the Rhino and Grasshopper file and the output. In the excel sheet below I have generated the LE without a shade and LE with auto-shade, in relation to the distance to the obstruction. I am expecting to find a pattern for LE with auto-shade; however the results fluctuate with distance. Could someone tell me please why LE with shading is not following a pattern with distance to obstruction?