Autodesk 24000-000000-9860 - Revit Architecture - PC User Manual page 1159

Parameter
Ballast Voltage
Ballast Number of Poles
Lamp
Wattage Comments
Photometrics: The following parameters affect rendered images. You may be able to obtain parameter values from the
manufacturer of the light source. Check the manufacturer's web site.
Photometric Web File
Spot Tilt Angle
Spot Field Angle
Spot Beam Angle
Light Loss Factor
Initial Intensity
Description
Voltage required to operate the ballast. A ballast is an electrical device
that provides the starting voltage and limits the current to sustain
lamp operation. (This information is used by Revit MEP.)
The number of leads in the circuit. Enter 1, 2, or 3. (This information
is used by Revit MEP.)
Number and type of light bulbs used in the lighting fixture. (This in-
formation can be useful in schedules.)
User-defined information about wattage requirements for the lighting
fixture.
The IES file that defines the light emitted from the light source. This
parameter is available when the
ric Web. (See Specifying an IES File for a Light Source
To specify a file, click in the Value column, and click
to the IES file, and click Open.
NOTE Revit Architecture does not maintain a link to the IES file. If
you change or update the IES file on disk, you must also update this
parameter by navigating to the new version of the file.
The angle to tilt the light source to direct its light. (See
Spotlights on page 1132.) Enter a value between 0 and 160. This para-
meter is available when the Light distribution setting is Spot or Photo-
metric Web. (See Defining the Geometry of a Light Source
1117.)
The angle at which the light intensity reaches 10% of the peak intens-
ity. Enter a value between 0 and 160. This parameter is available when
the Light distribution setting is Spot. (See
page 1132.)
The angle at which the light intensity reaches 50% of the peak intens-
ity. This parameter is available when the Light distribution setting is
Spot. (See Angles for Spotlights
A value used to calculate the amount of light lost (or gained) due to
environmental factors, such as dust and ambient temperature. Click
in the Value field to display the Light Loss Factor dialog. See
Factor Parameters on page 1123.
Brightness of the light before environmental factors reduce or change
the quality of the light. Click in the Value field to display the Initial
Intensity dialog. See Initial Intensity Parameters
Creating and Modifying Lighting Fixtures | 1121
Light distribution setting is Photomet-
on page 1114.)
. Navigate
Angles for
on page
Angles for Spotlights
on page 1132.)
Light Loss
on page 1125.
on