You can define different parameter values for different family types. See
Family Types
on page
366.
4
Define parameters as desired.
See
Parameters for Lighting Fixtures and Light Sources
on page 1119.
5
Click Apply.
6
(Optional) Repeat this process for other family types defined for the lighting fixture family: For
Name, select another family type. Define its parameters. Click Apply.
7
Click OK.
8
Save changes to the lighting fixture family.
Parameters for Lighting Fixtures and Light Sources
You can change parameters for lighting fixtures and their light sources when defining a lighting fixture in
the Family Editor, or when modifying a lighting fixture in a building model. (See
Modifying a Lighting
Fixture Family
on page 1115 or
Changing a Lighting Fixture in a Building Model
on page 1129.)
Description
Parameter
Electrical - Lighting
A value used by Revit MEP to indicate that the Coefficient of Utilization
will be calculated for the lighting fixture by default. In a project, you
can change this default behavior by changing instance properties.
Calculate Coefficient of Utilization (default)
A value used by Revit MEP to define the efficiency of a lighting fixture
in transferring luminous energy to the work plane in a particular area.
Coefficient of Utilization (default)
This value shows the percentage of lumens that reach the work plane
after light is lost due to the fixture’s efficiency at transmitting light,
the room proportions, and the ability of room surfaces to reflect light.
If you select Calculate Coefficient of Utilization (default), this parameter
is read-only. If you clear Calculate Coefficient of Utilization (default),
you can enter a value between 0 and 1, or enter a formula.
In a family, this parameter defines the default value for the lighting
fixture. In a project, you can change the default in instance properties.
Electrical - Loads
A value used by Revit MEP to define the real and reactive power used
by a fixture. To determine Apparent Load, multiply the apparent cur-
rent by the voltage. This parameter is measured in volt amps (VA).
Apparent Load
Dimensions
: These parameters do not affect rendered images.
The size of the symbol that represents the light source in 2D and 3D
views, extending from the boundary of the Emit from Shape outwards.
Light Source Symbol Size
For example, suppose you define a light source with an Emit from
Shape of circle and an Emit from Circle Diameter of 500 mm. If you
specify a Light Source Symbol Size of 200 mm, in a 2D view, Revit
Architecture shows a light source symbol that is 900 mm in diameter
(200+500+200). This parameter is available when the Emit from Shape
Creating and Modifying Lighting Fixtures | 1119
Summary of Contents for 24000-000000-9860 - Revit Architecture - PC
Page 1: ...Revit Architecture 2009 User s Guide April 2008 240A1 050000 PM02A ...
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Page 116: ...78 Chapter 3 Revit Essentials ...
Page 172: ...134 Chapter 4 ProjectViews ...
Page 178: ...Schedule with Grid Lines Schedule with Grid Lines and an Outline 140 Chapter 4 ProjectViews ...
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Page 739: ...Curtain wall Curtain Grid Curtain Walls Curtain Grids and Mullions 701 ...
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Page 1276: ...1238 Chapter 20 Design Options ...
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