Probe start in Europe are very unusual, as the 230V OCV of the common series choke ballast is not enough to ignite them so they need at least a low voltage ignitor. So very early on, they got replaced by simpler construction HV pulse start (no auxiliary probe, resistor nor probe bypass bimetal, easier handling of the arctube heat management because the missing probe gives more design freedom to shape the arctube there to tune the temperature profile,...). And because other pulse start lamps were already becoming the mainstream, the HPS (again, in Europe designed with arc voltages in the 70..90V range to suffice with a 230V OCV series choke), the pulse start MH's, mainly the lower wattages, were designed along the HPS specs. But many higher power MH (mainly "400W" and above, even when HV pulse start) were designed along the MV specs (arc voltage in the 100..135V range), as that yields lower ballast losses. So in Europe, many MH's of higher power rating exist in two formats, one for "HPS ballast" and one for "MV ballast", not interchangeable. Some more modern lamps were rated for operation on both ballasts, but each ballast type yields different optical properties (and the lamps are rated so; warmer color and higher real power and output on HPS gear, colder color temperature and lower power and output for operation on MV ballast - e.g. a "400W" tend to operate at 360W 5000K Ra70 on "400W MV" and 420W 4000K Ra80 on "400W HPS"), so although the same lamp, the different properties make these two ballasting options not interchangeable either.
And these pulse start MH specs were then brought to the US, where each lamp spec got its ANSI code. But they are essentially the European spec lamps, so practically each European (pulse start) MH will have its matching ANSI code.
The only HID family where there is no correspondence US vs Europe are the HPS. There not only the designed arc voltage differ, but as well the response on varying power, so different ballast load characteristics (US lamps are more thermally stable, so less prone to thermal runaways, but have wider tolerance of the arc voltage at the nominal operating point). Plus the US has its speciality in the low voltage HPS lamps (the 55V lamps designed for a series choke at 120V; Europe has all lamps in the 70..100V arc voltage range, just because of the anticipated 230V mains).
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