If you have the LE running when the show isn't then I would reccomend that you have the dongle running as well. If there is no input to the LE, it is possible for it to pickup line noise and interpret it as a command and turn on some of your lights. The dongle will keep sendng the last set of commands it was sent and if that happens to be all off, then that is what it will keep sending which will keep the lights off.