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Light Fixtures

This section describes how to use light fixtures.

Common Light Fixture Information​

The values that can be specified for a light fixture are listed below.

  •  Callout: The name of the light fixture.

  •  ☐ Include in Schedule Whether the light fixture type is displayed in the light fixture schedule that is inserted on the drawing. Most light fixture types will have this box checked. It is commonly unchecked for existing light fixture types and light fixture types that are being used to model other types of devices in your project.

  •  Load 1, ☐ Load 2, ☐ Load 3 Light fixtures can have up to three different loads assigned to them. Each load can be connected to a separate circuit.

    If the light fixture will always be connected to a single circuit, only one load should be used. If the light fixture could be connected to multiple circuits, multiple loads should be used. A common use for multiple loads is emergency lighting, where some lamps are connected to a normal circuit and other lamps are connected to an emergency circuit.

    Each load can have the following values set:

    •  Load Description: The description shown in the panel schedule for this light. LIGHTING is the default, but it can be changed.

    •  Number of Lamps: The number of lamps (bulbs) in the light fixture.

    •  Lamp Description: Description of the lamp if needed.

    •  Input VA: Load of the fixture including the ballast, if applicable.

    •  Watts / Lamp: The wattage of each lamp.

    •  Lumens / Lamp: The number of initial lumens per lamp.

    •  Egress Mode Lumens / Lamp: The number of initial lumens per egress mode lamp.

    •  Lamp Depreciation: The depreciation ratio of each lamp. Lamp depreciation may include fixture dirt or lens depreciation, where applicable.
      Actual Lumens=Lumens / Lamp×Lamp DepreciationActual\>Lumens = Lumens\>/\>Lamp \times Lamp\>Depreciation

    •  Ballast: ▾ The type of ballast on the light fixture. Default ballasts are available in the list. To specify a ballast that is not included in the list, select Custom and enter the value in the field below.

  •  Volts: ▾ The voltage of the light fixture.

  •  Mounting: ▾ How the light fixture is mounted. Default mounting types are available in the list. To specify a mounting that is not included in the list, select Custom and enter the value in the field below.

  •  ☐ Default Elevation: The default elevation when this type of light fixture is inserted on the drawing. Elevation can be modified for individual light fixtures during and after insertion.

  •  Arm Length: The length of the arm of the fixture. In photometric calculations, the light source is moved this distance from the insertion point of the light fixture block. See the Distance Input Format section for more information about specifying this length.

IES File Settings​

The settings in this area are for IES files used in calculating point-by-point photometrics.

  •  Number of Heads: ▾ The number of heads on the fixture.

    •  One Light is distributed once in the direction of the insertion angle of the light fixture.
    •  Two, 90 degree offset Light is distributed in the direction of the insertion angle of the light fixture and at 90 degrees counterclockwise.
    •  Two, 180 degree offset Light is distributed in the direction of the insertion angle of the light fixture and at 180 degrees.
    •  Three Light is distributed in the direction of the insertion angle of the light fixture, at 90 degrees clockwise, and at 90 degrees counterclockwise.
    •  Four Light is distributed in the direction of the insertion angle of the light fixture, at 90 degrees clockwise, at 180 degrees, and at 90 degrees counterclockwise.

  •  IES Rotation: The counterclockwise rotation of the IES file relative to the fixture in degrees. Use this value to rotate the IES file if it does not point in the same direction as your light fixture block.

  •  General Scale Factor: Multiplies the light output by the number specified. For use with IES files for LED light fixtures that model a single LED or cluster instead of the entire fixture.

  •  Egress Scale Factor: Multiplies the egress mode light output by the number specified. For use with IES files for LED light fixtures that model a single LED or cluster instead of the entire fixture.

Energy Code Settings​

The settings in this area are for energy code calculations. In particular, they are used when exporting light fixture information to COMCheck.

  •  ☐ Exempt Whether this type of light fixture is exempt from being counted in energy calculations. Light fixtures that have this box checked will not be exported to COMCheck. This will vary by state, but emergency or exit lights are often exempt. This setting can be overridden on an individual light fixture basis on the drawing if necessary. See the COMcheck Lighting Export article in the knowledge base for more information.

  •  ☐ Watts: The load to export to COMCheck. If this value is not specified, the Input VA is exported instead.

  •  Fixture Type: ▾ The type of fixture to export to COMCheck.

  •  ☐ Description: The description to export to COMCheck.

Schedule Settings​

The settings in this area are for notes that can be displayed when the light fixture project schedule is inserted on the drawing. See the Insert Light Fixture Project Schedule section for more information.

  •  Schedule Description: A description of the type of light fixture.

  •  Model 1:, Model 2:, Model 3: A description of the model for the light fixture. In the light fixture schedule, the three models can be shown in a single column or in three separate columns. See the Edit Light Fixture Schedule List section for more information.

  •  Note 1:, Note 2:, Note 3: These notes can appear on the light fixture schedule on the drawing. See the Schedule Notes section for more information about using these notes.