These have to be either 277V or 480V. No way a highmast pole with eight 400W lamps is 120V. That's about 27A. Very inefficient for an installation of this size since you'd need each pole to be on its own circuit or even two circuits for one pole. Looks like they've got some relamping to do too.
Yeah highmast poles are usually fed from either 480v or 600v three phase power. If looks like these might be fed of a 3PH supply since you can see the different brightness between fixtures. (There is a 120 deg phase shift between each phase on a 3PH system so the fixtures flicker a different times).
ah that's interesting about the 3ph fixtures flickering at different times like that. I guess it makes large installations like this "better" since the non-flickering lights would probably drown out the flickering ones so the flickering isn't really noticable.
Wow that's freaky! How do you loose a phase? Does that have something to do with a transformer malfunction or something? Are the big units your emergency light? If so, that's really incredible that they lasted 8 hours! LEDs are great for emergency lighting since they don't drain the batteries like halogens!
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