3D Lighting Simulation
For lighting projects we always try and use IES data files where possible. This gives us the most accurate results when rendering an image. These IES files are imported to our core modeling software 3D Studio Max and applied to virtual photometric lights to create a realistic simulation of light distribution in the model.
The IES data format is an internationally accepted data format used for describing the light distribution of luminaries. It can be used in numerous lighting design, calculation and simulation programs.
A good example of a lighting simulation can be seen here