for the parerall streetlighting system ( POCO) side useally 120 or 277 volts depening on the area the streetlighting hook up. also for the privte area like store parking lot lumaires system will varies alot most time i keep on high side if possible due the wattage and distance. most common are 277/480 volts for very large area but for smaller parking lots useally 120/208 or 120/240 depening on what the service system is set up. some case have to use the transformer to boost it up if the distance is pretty far.
most city dont have series street lumaire setup anymore.
someone in here ask about the light blub for series connetion set up. there are very few manfactures do still make it but will listed in specity appaction i.e. Aeroports , and few other specal listing there. if that person want to know where to find it let me know i can post it here where is the source for the odd ball lightbulb.
merci , marc
