Have 15 of these to do in a patio external obviously. It's actually brick paving. I need to core a hole approx 100mm per light. My problem is I just don't know what the best way to terminate would be. Of course I'll need some sort of ip rated jb for each light but where should this go? Down below the light fitting? Under another brick beside? The fitting come supplied with a jb and about 3 feet of flex. Any thoughts?