Revise the first paragraph to read:
“Illuminance is the total quantity of light, or luminous flux, that falls on a surface, as measured in footcandles or lux. This measurement is usually taken on the horizontal plane, at either the ground or the workplane, but measuring vertical illuminance is helpful for understanding how much light is hitting a building façade, a human face, or the vertical plane at a property boundary. Simply put, vertical illuminance can be explained as standing outside the boundary looking straight into the site at eye level (or horizontal if you are on the ground looking up).”

Insert a new paragraph below the first paragraph that reads:
“In calculation software, a vertical calculation grid is placed at the location where the measurements need to be taken. In person, measurements are taken using a light meter held vertically. For the purposes of LEED, only the calculation grid for the one vertical plane with greatest vertical illuminance is required to be submitted, and not more. Projects must still assess all of the areas on the boundary for vertical illuminance, but create documentation for only the worst case scenario because all other vertical planes will show lower illuminance values, and thus will comply with the requirements. If there are unique situations, like sensitive areas that require different thresholds, calculation grid documentation for those scenarios should also be submitted.”

Delete the following sentence in the next paragraph:
“It can be given as a function of the incident angle (A) of the luminous intensity (I) and the distance from the luminaire to (P).”