Can anyone tell me why certain light sets seem to cling to the set used just before? I've tried to make some light sets for a new character I have developed, but when you switch from one set to the next, the lights from the previous set seem to hang in there....any help would be very much appreciated :)

My guess is that Poser will only replace lights with the same name. If your current scene has Light 1, Light 2 and Light 3 and the light set you want to load has a Light 1 and a Light 3, Light 1 & 3 will be replaced while Light 2 stays with you.

Hope this helps.