You can use one of your light connect to your computer. Through this like you can use your computer to connect to the rest of the light you have and program them. Once you got the light program, you can disconnect the light from your computer. Your light will not be Online all the time, but there is really no need to, unless you want to change your light setting from somewhere else, like while on vacation.
You don't have to have a ReefLink but it is easier if you do and you can program your light remotely. Not that I want to do that, but I can.