I am trying to follow the Revit electrical tutorial with creating a lighting analysis schedule in a real world project. I've made my schedule and placed my lights in the plan but Revit is not calculating the Average Estimated Illumination for the spaces. My gut feeling is this is happening because each discipline has a seperate central file: Architect, Mechanical, Plumbing, and Electrical. However, I do have the "space" in my drawing created but I still can't get the numbers to come up. Any help is greatly appreciated.