Define the Light Loss Factor

The light loss factor is a value used to calculate the amount of light lost due to environmental factors, such as dust and ambient temperature.

You can define the light loss factor for a lighting fixture family file (as follows). In a project, you can change the light loss factor of an individual lighting fixture. (See Changing the Light Loss Factor for a Light Source.)

To define the light loss factor

1. Open the lighting fixture family.
2. Click Create tabProperties panel (Family Types).
3. For Name, select the family type to modify.
4. Scroll down the list to locate the Light Loss Factor parameter, and click in its Value column.

   The Light Loss Factor dialog displays.

5. Specify the calculation method for Light Loss Factor:

   Simple calculation

   • Specify as follows:
     1. For Method, select Simple.
     2. For Total Light Loss Factor, move the slider to adjust the value between Dimmer and Brighter.
     3. Click OK.

   Advanced calculation

   • Specify as follows:
     1. For Method, select Advanced.
     2. Under Value, adjust the sliders for each parameter, or enter a value in the text box.

        See Light Loss Factor Parameters.

     3. Click OK.

   The Family Types dialog displays the new Light Loss Factor value.

6. Click OK.
7. Save changes to the lighting fixture family.