You are here: Home > Support > Knowledge Base > Light Fixture Cutoffs and Shields

Light Fixture Cutoffs and Shields

Thursday, August 29th, 2019

Q: Can Design Master Electrical and Design Master Photometrics account for different cutoff configurations on light fixtures?

A: Design Master does not account for cutoffs specifically; however, you can model an approximation using the Insert Solid commands.

NOTE: Some manufacturers may provide IES files for different cutoff configurations. Check for this first, as the IES files they provide will be more accurate than trying to model the cutoff yourself.

  1. Create the light fixture and insert it on the drawing.
  2. Run the Insert Solid: Line command.
    • Ribbon: DM Electrical->Point-by-Point Photometrics-> dm_elec-photoline Insert Photometric Solid: Line
      DM Photometrics->Solids-> dm_photo-photoline Line
    • Pulldown Menu: DM Electrical->Point-by-Point Photometrics->Insert Photometric Solid: Line
      DM Photometrics->Insert Solid: Line
  3. Set the Starting Elevation to an elevation below the fixture elevation. How far below will depend upon the type of cutoff you want to model (see image below).
  4. Set the Ending Elevation equal to the elevation of the fixture.
    Note: Setting this elevation higher will not affect light distribution for this fixture, but could affect light distribution for nearby taller fixtures.
  5. Press the OK button.
  6. Draw an approximation of the cutoff shape around the fixture (circle/semicircle for circular fixtures, rectangle/straight lines for rectangular fixtures, etc.).

Once the cutoff is drawn, perform a photometric calculation on the area to see if the light distribution is behaving the way you want. If the light distribution is too open or closed, use the dm_photo-query Querydm_elec-photo-queryLOO Query Calculation Area or Solid command to adjust the solid’s Starting Elevation, then recalculate. When the light distribution looks correct, you can then use the standard COPY command to place more fixtures with the cutoff on the drawing.

 

Related Articles

Filter by
Post Page
Electrical Training Recording Electrical Training Light Fixtures Electrical Rooms HVAC Plumbing
Sort by

Training Recording: Elevation Labels and 3D Drafting Options

This training video teaches you how to customize elevation labels and 3D drafting using the Design Master Electrical Options menu.

0

Training Recording: Creating Custom Blocks

This training video teaches you how to create custom blocks for use in Design Master Electrical.

0

Room Data and Photometrics Show Different Foot-candle Values

Different values for room and point-by-point foot-candle calculations are a result of different calculation methods.

0

Exempt Callout on Light Fixtures

Light fixtures marked as exempt are inserted on the drawing with an additional callout, which you may not want to display.

0

Exporting to IFC and Alignment Points

If your exported IFC file does not line up properly, you may need to adjust your alignment point.

0

Incorrect Light Distribution from Light Fixtures

Odd light distributions can be caused by differences between the light fixture block and the IES file.

0

Products

Electrical for Revit

Electrical for AutoCAD

HVAC for AutoCAD

Photometrics for AutoCAD

Support

Contact Support

Install & Update Instructions

Online Training

Knowledge Base

User Manuals

Tutorials

Release Notes

Downloads

Wish List

Remote Support

Company

About

Customer Stories

Awards

Newsletter

Blog

Pricing

Electrical for Revit

Electrical for AutoCAD

HVAC for AutoCAD

Photometrics for AutoCAD

Free Trial

Electrical for Revit

Electrical for AutoCAD

HVAC for AutoCAD

Photometrics for AutoCAD

©2001-2019, Design Master Software, Inc