they do that so you can know what it should look like when your done. there are mounting brackets on the inside of one of the collars that you mount your socket assembly to which plugs into the ballast on the other end.
Dnutz Reviewed by Dnutz on . 600 HPS Cool Tube Grow Light System 600 HPS Cool Tube Grow Light System is the cooltube wired to the right cordset and plugged into the ballast? i really want to order this system, but every company i email eventually tells me "no we dont wire the ballast to the cooltube"... anyone have one from bghydro that could comment ? Rating: 5