I just received my 11836 from dx for my surefire G2. Well first off it will not fit right into my G2 so it looks like it might need a little custom dremel work, but what worries me is when I touch it to the brand new batteries the LED does not turn on. AM I missing something, the stock P60 bulb fires right up after making contact with the batteries. Thanks for the help. Could it be a defective bulb and is it a goat rope to get a replacement from HongKong?