It means they are limited on how many light sets you can combine. We have no such limitation(s) on “zones” and “groups” of lights. We have combined 8, 10, even more than a dozen different lights sets on a single cart many, many times. And our proprietary app allows set the effect, brightness, speed and other parameters for each one individually or in groups to create amazing coordinated and complimentary looks. Or you can simply set everything to a single “group” and have your wheel lights, underglow, whips, roof lights, light bars, fog lights, speaker lights, accent lights, etc., all running the same thing.