I have one that I have used to setup my Vectra pump and now my radion lights, but I am not really sure what ongoing role it plays. When I program the lights, for example, is the program 'kept' in the lights such that the reeflink could be shut down until the next time I wanted to change the program? Or does reeflink act as the home for the daily program and send signals to the lights continuously (or at least periodically)? I have assumed it is the latter, but when a buddy of mine asked I realized I wasn't completely certain.