This .NET enum wraps the ObjectARX AcDb.LightingUnits enum. 

Accesses the lighting units for a drawing.

Public Enum LightingUnits
  LightingUnitsGeneric
  LightingUnitsAmerican
  LightingUnitsInternational
End Enum

public enum LightingUnits {
  LightingUnitsGeneric,
  LightingUnitsAmerican,
  LightingUnitsInternational
}