So, in this case, would the 425W H40 mercury vapor lamp still be overdriven on a 1000W M47 probe start metal halide CWA ballast even if the series capacitor value is near zero microfarads or could the ballast suffer possible overheating?
Alternatively, it may seem that a last resort for running these lamps could be to source a step up transformer with a 480V secondary and possibly do a series of trial and error tests of series choke ballast combinations until the lamp is running at the proper 1.7A operating current and 265V arc voltage drop?