Series circuits have been used since the dawn of electric streetlighting. In the olden days, series streetlights were the only way to light extended areas. A single #6 or # 8 awg wire could be used for hundreds of small (600 or 1000 lumen) incandescent lamps. The constant current transformers used to supply series circuits are rated in kw. I believe that the largest constant current transformer that can be pole mounted is 30kw. According to the GE catalog,the 175 watt series ballast has a "loading factor" of .4 kw, so a series circuit supplied by a 30kw constant current transformer could operate about 75 of these fixtures. The voltage of this series circuit would be about 2250. The voltage used in one fixture including ballast loss
equals (ohms law) voltage=wattage divided by current, voltage=200watts divided by 6.6 amps = about 30 volts per fixture,
times 75= 2250 volts total.
so I can run one of these off of 30 volts?