Located on a Westfield Gas & Electric Pole. I'm not sure who makes the arm this fixture is mounted on but they are plentiful in parts of Westfield. This fixture is 150 watt HPS and wired at 120 volts.
Sometimes the U bracket that is in the middle of the arm starts to slide if it is not tight enough......my friend found one that slid all the way...and banging the fixture to the pole downwards....damaging the Josyln Spaceship fixture......he posted it once.....but got deleted...........
*UPDATE* this fixture and arm has been replaced. The arm is now a 6' upsweep with underbrace aluminum arm and an AEL autobahn LED streetlight has been installed. Westfield has now gone the way of the LED. Updated photo to come.