easy rendering for Rhino in Windows
If you go to the properties dialog, then click on the light icon, you will see a Visible check box. Uncheck the Visible and the light source will not render, only the light will be projected.
Thank you Scott, That did it!
Great. I also notice the radius of those sources is quite large. This can lead to unwanted effects. In the Properties dialog > Light Properties, set the radius of the source to a reasonable number. This is to represent the radius of the actual source.