I am trying to fill out the Surface Reflectance tab of the Indoor Lighting spreadsheet. My project is in a 105,000 sq foot manufacturing plant. With the exception of the office area, almost all of my furnishings in plant are stainless steel and plexiglass. The problem is that I have 3.5 miles of stainless pipe, several thousand of feet of conveyors, and 66 very large pieces of equipment.

How in the word do I calculate this?