2013

Table Of Contents
Standard and Photometric Lighting Workflow
Types of lighting selected globally affect a drawing.
Set the Type of Lighting
AutoCAD offers three choices for lighting units: standard (generic),
International (SI), and American. The standard (generic) lighting workflow is
equivalent to the lighting workflow in AutoCAD prior to AutoCAD 2008. The
default lighting workflow for drawings created in AutoCAD 2008 and later is
a photometric workflow based on International (SI) lighting units. This choice
results in physically correct lighting. The American lighting unit provides
another option. American differs from International in that illuminance values
are formatted in foot-candles rather than lux.
In previous versions of AutoCAD, standard lighting was the default. You can
change the type of lighting with the LIGHTINGUNITS system variable. The
LIGHTINGUNITS system variable set to 0 represents standard (generic) lighting;
set to 1 represents photometric lighting in American units; set to 2 represents
photometric lighting in International SI units.
Add Lighting to Your Model | 715