You can detach and remote mount the ballasts - It's no problem at all, as long as you keep the lamp leads as short as you can. I added a 70W MH security light to a 150HPS housing and remoted out both ballasts to keep heat down. Get a metal junction box that'll fit everything, and get some heavy duty wire and wire nuts, and extend it out and strap everything down in the box. I can post some pics of mine if ya like.