yoyo balls are garbage IMO. I don't know what they are called but I made the switch to the ones you are using 1 week after purchasing the yoyo balls and the difference was night and day. I can raise and lower my lights in about 3 seconds as opposed to lets say 1 minute with the yoyo's. GoodLuck with the set up it looks awesome! Question though maybe you haven't had it running long enough to know yet but how many cfm fan are you using to cool those big boys and are the temps to each light going to vary? I'm sure you considered it while making your room but I didn't:jointsmile:A couple on one side burned while ones under other light were fine.