400 Watt Mercury Vapor Outdoor pole light fixture in Poughkeepsie, New York

This light works well and is used for a parking lot or added security in out of the way places. Approximately 18 inches square
See a video
http://youtu.be/EZaCaLT1udw
of the light being turned on and off. The camera tried to compensate for exposure making the video appear a little "off".