either make a support bracket on the inside of the housing or what might be easier is once you bend the rod into a circle, bend each end of the rod back 90 degrees so its pointing towards the back of the housing and drill a hole for each end of the rod on the back end of the housing. then epoxy or silicone around the rods once youve stuck them through to prevent any water leaks. then attach your led's to each end of the rod.
