my B22 100 watt westinghouse lamps

I had this case of Westinghouse lamps for a while. Westinghouse A21 100 watt B22
and it also 125 volts. sadly this my worse of the westinghouse bulbs averaging 150 hours each. blacken up on the inside after first day of running. I got little more life out of it using a 240 volt to 120 volt transhormer on 120 volts running them on 63 volts
either the lamp not pump down good or thet installed the ffillament while it kinda wet
as seem to have bit of water problem.