We have 1 main hub and I belive either 1 or 2 of the additional small ones connected to the main hub. The only issue this way is you can't control the 52w from the 95w, but I've not had any issues with them being the same intensity.So I just came across this thread and your setup is great. I just recently purchased dual R24 52w from SaltwaterAquarium.com, awesome service so thanks to them. I was just curious on your setup with 6 lights how do you have them connected to each other or do you use multiple bluetooth controllers to connect them? I have a new 60 breeder tank from Aqueon and saw your earlier posts about the center tank brace and looking to add 2 more to fill that area with light. Also sorry for posting this twice sorta a noob at this...lol Thanks.