Lighting Design is a program designed to perform several calculations from the tables and formulas of the Electrical Engineering Reference Manual, IES Lighting Handbook, Lithonia Lighting coefficient of utilization tables, and the National Electrical Code.

It is a design tool intended to speed the process of designing indoor lighting systems for simple rectangular rooms with a single Luminaire Type. For indoor lighting situations, the Zonal Cavity Method is used with data from manufacturer coefficient of utilization tables. It is ideal for designing classrooms, warehouses, offices, and other common rectangular applications. The program quickly calculates fixture quantities, spacing, average illuminance, and fixture quantity per circuit.

The five categories of the program are:
     Step 1
          The seven tabs that fall under this main tab are used to accomplish the first three basic steps in any calculation of illuminance level.
          Light Levels
               Calculate recommended footcandle illuminations for area use and activity.
       Cavity Ratio
               Calculates the cavity ratios for the three zonal cavities corresponding to the room height, width and length.
          Reflectance
               Calculate room reflectances based on material type or color and cavity ratio.
       CU
               Twelve standard fixtures and their automated coefficient of utilization tables.
       CU Adjustment
               Calculate an adjusted CU for an effective floor cavity reflectance above or below the standard 20 percent.
        LLF
               Calculate the combined lamp loss factor (LLF%).
        Interpolation
               Straight line interpolation/extrapolation calculators.
     Step 2
          Calculate the average foot candles to light a space.
     Step 3
          Calculate the number of fixtures needed to obtain a desired illuminance level.
     Step 4
          Calculate the placement of the fixtures in rows and columns to maintain a uniform lighting system.
     Step 5
          Calculate the number of fixtures on a circuit.

Lighting Design includes a database to store lamp data for use in the calculations of the program. The database includes seventy-six standard lamps, and provides for adding, editing, and deleting lamp data.