Features
The Interior Tool will calculate the number of luminaires needed to meet an average
illuminance across the workplane for an enclosed rectangular room using the principals
of the lumen method. You can also use the Interior Tool to determine the illuminance
achieved by a specified lighting power density or luminaire quantity.
- Load multiple IES files into the tool
- Isometric, elevation, and reflected ceiling views
- Learn about how the Lumen Method Works
- Quickly calculate simple rooms
About
The Visual Interior Tool is designed to perform lumen method calculations on a rectangular
room. The lumen method determines average illuminance achieved on the workplane
using a derived property of luminaire photometrics and room geometry called the
coefficient of utilization. The lumen method makes the following assumptions
- Luminaires are spaced uniformly
- Room is empty
- Surfaces are diffuse
- Surfaces have neutral color
Because the lumen method provides an average illuminance, point values for calculations
might vary considerably. Please use the professional edition of Visual for full
lighting analysis.
Values calculated during the zonal cavity method are shown in the collapsible panel
below the Display settings. These values are provided to help those curious about
how the zonal cavity method works see the intermediary values that must be calculated
in order to perform the calculation. For more information on the lumen method /
zonal cavity method consult the IESNA Lighting Handbook.
Help Information