Creating a Luminaire Source

The Luminaire Source allows you to model artificial light for outdoor and indoor lighting.

To create a Luminaire Source:

Important: In case you want to add the source in a Direct simulation, make sure that all parts of the source are enclosed in one single body, or in one ambient material, and therefore are not located in two (or more) bodies or ambient materials. Otherwise you may generate propagation errors.
  1. From the Light Simulation tab, click Luminaire .
  2. From the Intensity file drop-down list, click Browse to load an intensity distribution file (.ies, .ldt file).

    A preview of the rays' distribution appears in the 3D view.

  3. If you do not want to inherit the flux from the file, set Flux from intensity file to False and edit the flux in lumens, watts or candelas.
  4. From the SpectrumType drop-down list:

    • Select Blackbody to set the temperature of the source in kelvins.

    • Select Library and click Browse to load a .spectrum file.

      If you want to see the file's properties or edit the file, click Open file to open the Spectrum Editor.

    • Select one of the predefined types available : Incandescent, Warmwhite fluorescent, Daylight fluorescent, White LED, Halogen, Metal Halide, High Pressure Sodium.

      Note: Each type of source uses a standard spectrum.
  5. Set the Axis System of the source by clicking in the 3D view and select one point for the origin and two lines for X and Y axes or click and select a coordinate system to autofill the Axis System.
    Note: If you define manually one axis only, the other axis is automatically (and randomly) calculated by Speos in the 3D view. However, the other axis in the Definition panel may not correspond to the axis in the 3D view. Please refer to the axis in the 3D view.

    If you need to adjust the ray's propagation direction, use Reverse Direction on X and / or Y.

  6. In Optional or advanced settings :

    • Adjust the Number of Rays and Ray Length to display in the 3D view.

    • If you want to display the intensity diagram in the 3D view, set the option to True.

      This is a visualization parameter. It displays the intensity diagram of the intensity distribution file used to define the source. If the default size is not big enough, you can increase it to observe the 3D diagram.

The Luminaire Source is created and appears in the Simulation panel and in the 3D view.