dlk30341: Usually, the light set doesnt actually include the black lights. Imagine, if you will, that you have two light sets in the library: Light Set #1, which has 20 lights; and Light Set #2, which has only 3. If you load Set #1, then immediately load Set #2, you'll get 3 working lights, and a bunch of black lights -- 17 of them, in fact; but if you delete all lights in the scene and THEN load Set #2, you'll get 3 working lights, and NO black lights at all. Basically, whenever a new light set is loaded, Poser compares the number of lights that the new set needs, with the number of lights already in the scene. There are 3 possible outcomes: -If the new set needs exactly the SAME number that are already there, no problem. Poser just takes the existing lights, and uses them to create the new light set by repositioning them, changing their intensity, etc. -If the new set needs MORE lights than are already in the scene, Poser creates new lights until there are enough to satisfy the new set; then it repositions them & changes their dials to match the new set's parameters. -But if the new set needs FEWER lights than are already in the scene, Poser just takes as many of the existing lights as it needs for the new set; the other, leftover lights are no longer needed, but instead of deleting them, Poser turns them into "black lights", thus making them essentially useless.