This .NET enum wraps the AcGiToneOperatorParameters::ExteriorDaylightMode ObjectARX enum. 

It provides the exterior daylight modes for the tone operator.

Public Enum ExteriorDaylightMode
  DaylightOff
  DaylightOn
  DaylightAuto
End Enum

public enum ExteriorDaylightMode {
  DaylightOff,
  DaylightOn,
  DaylightAuto
}