Well, generic 35(39)W MH lamp is specified assuming sinewave current at line frequency. It is a little known that MH lamps need some ~10% less current at the same power when running on squarewave electronic ballast due to power factor now essentially becoming 1 instead of ~0.9 when on line frequency sinewave.
Automotive lamp was for sure never meant to be run on the ballast choke, so may be Dor was not that much off the truth... )
Yes indeed I am aware of that. The current figure come from Osram datasheets, with 0.5A for an lamp exclusive for electronic ballast and the 0.53A for a lamp with choke. However I have looked at IEC 61167:2018 and there the following is specified:
With a choke: 0,53A
With an electronic Ballast: 0,46A.
So if we take ground on the IEC standard -what we should-, dor123 is correct and i apologise. However I find it strange that Osram lists other currents for their electroic only lamps.
Regarding interoperability:
D2 lamp on choke: Might work, however may have reduced lamp life as a choke has a higher current crest factor ans therfore more wear on the elctrode. Also the 15-25kV Ignition pulses may damage choke isolation.
Running a D2 lamp on 35W electronic ballast-does not work, no ignition, I have alredy tried that.
Running a 35W CMH on D2 gear, possible, maybe slightly underdriven, but that would need to be checked. However there may be problem when these lamps are tried to be hot restricken as they are not made to whithstand the ignition voltage.
When I am back home i would do some experiments with that. I have philips Prima vioson elctronic gear for CMH and two D2 lamp contrrolla, one BMW branded (Most likely made by Hella) and one chinese and see how they perform.
What I am also not sure, how exactly the D2 lamp ballast drives the lamp. When the lamp is first inited the ballast "overloads" The lamp in order to get it warmed up quickly.