It is always possible for a bad batch to get through QA control measures, but before I blame manufac. I would recheck my connections (including ballast taps) - then I would try again w/pc...I use the box it came in to block the light.
Another thought...wire the fixture straight through (no pc) and check that the bulb actually lights - so many things can go fubar from source to bulb: connections, capacitor, ignitor, etc.
~~ CELTIC ~~
...-= NJ =-...