The efficacy value.

Namespace: Autodesk.Revit.DB.Lighting
Assembly: RevitAPI (in RevitAPI.dll) Version: 24.0.0.0 (24.0.0.0)
Since: 2013

Syntax

C#
`public double Efficacy { get; set; }`

Visual Basic
`Public Property Efficacy As Double Get Set`

Visual C++
`public: property double Efficacy { double get (); void set (double value); }`

The efficacy value in lm/W as a numerical value greater than 0.0 and less than 1.0e+10.

Exceptions

Exception	Condition
Autodesk.Revit.ExceptionsArgumentOutOfRangeException	When setting this property: The efficacy value is not valid because it is not between 0 and 1e+30.