Calculations & Results
The following links span the world of lighting calculations with ElumTools.
Calculation Metrics (what can ElumTools calculate)
Calculate Other (Selected Elements)
Layout Assistant (intelligent luminaire placement & calculation)
The Calculation Viewer (rendered results)
The ElumTools Calculation Engine
ElumTools employs the same calculation engine as our stand alone software program AGi32 which has been an industry standard since 1999. AGi32 has been validated using CIE171 and has been privately tested in countless realworld applications.
There can be potential differences in calculated values when comparing ElumTools results to those from AGi32. However, given equivalent input data, calculated values are within +/ 2% and computation time is similar.
Most discrepancies between the two programs can be attributed to modeling differences:

In most cases (surface geometry in) the Revit model is significantly different than the AGi32 model
 Holes are cut for facebased fixtures in Revit

Size of a Room or Space is a net measurement affected by drywall thickness
 Luminaire family geometry versus AGi32 luminaire symbol
 Materials differences (reflectances)
 Differences in calculation precision (meshing).
 ElumTools uses a slightly more refined surface mesh by default.
 ElumTools has Adaptive Subdivision enabled by default
 Differences in calculation point display precision