You can set the Field and Beam angles. Use a Beam angle of “0” to visualize only the field angle. You can also press the Get Light Info Data button to access the beam and field angles and candlepower stored in the Light Info Record of your symbols. The symbols that shipped with Spotlight as well as those commercially available, like Soft Symbols , have photometric data already attached to them. Use the Use Light Info for Selected menu command to apply Light Info data to more than one beam object.
The drop-down menu allows you to select which type of fixture you are using: Standard (Fixed focus leko), PAR, or zoom. The PAR option will add a bottle rotation slider above, add additional fields for the Horizontal beam information, and change the shutter sliders to barndoors. Zoom will add a zoom slider, and additional fields to input the widest angle of the light (Beam Angle should be the narrowest, Beam angle 2 the widest).
Enter a Peak Candela to calculate illuminance. Use the Correction Factor to adjust the calculated illuminance based on a lamp spec or a rule of thumb to account for gel or dust.