Autodesk 256B1-05A761-1301 - AutoCAD Revit Structure Suite 2010 User Manual page 1228

Parameter
Color Filter
Defining 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
on page 1196.)
To define the light loss factor
1 Open the lighting fixture family.
2 Click Family Properties panel
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.
5 Specify the calculation method for Light Loss Factor:
6 Click OK.
7 Save changes to the lighting fixture family.
1186 | Chapter 19 Rendering
The Light Loss Factor dialog displays.
Simple calculation
Specify as follows:
a For Method, select Simple.
b For Total Light Loss Factor, move the slider to adjust the value between Dimmer and
Brighter.
c Click OK.
Advanced calculation
Specify as follows:
a For Method, select Advanced.
b Under Value, adjust the sliders for each parameter, or enter a value in the text box.
See Light Loss Factor Parameters
c Click OK.
The Family Types dialog displays the new Light Loss Factor value.
Description
typically become more yellow when dimmed. Select Incandescent
Lamp Curve or none.
To see the effect of this parameter, you must dim lights in the building
model. See Dimming Lights
Color used to change the light emitted from the light source. Click in
the Value column. In the Color dialog, select the desired color, and
click OK. See Colors on page 525.
Changing the Light Loss Factor for a Light Source
Types.
on page 1187.
on page 1197.