I included the advanced shadow options
@Stopper exposed in his lighting plugin. Most of it isn't that useful here cause the lights are typically close to the target.
But the "
Shadow Near Plane" can be very useful. If there are objects besides you, they usually obstruct the lights. Increase the near plane value in that case, so that these objects close to the light do not cast shadows.
This is especially true if you are in an environment with a rather low ceiling. Crank up the near plane for the backlight in that case, which is typically placed up high.