This could be useful when combining light sets. If you made up a series of lights, each using a different light number - face spot, backlight, side fill, ambient and so on - you could include the appropriate lightOn lines to keep the other parts of the set illuminated. Probably exclude the default lights (1, 2 & 3) and arrange for them to be always off. I assume "lightOn 0" turns a light off? Just thinking aloud. Thanks for the inspiration.