I just bought a hubbell 150 watt wall pack, the one from kleen rite catalog. They also sent me the bulb that goes with it. Problem is none of the metal halide bulbs are working in the unit. There is power going to it and regular household 60watt bulbs work just fine. Is there something going on with wiring or I'm I using bulbs that are not compatible with the unit. I have tried 3 metal halite bulbs, none work. Any thoughts? Thanks in advance.