Which ballast for 400w radiums

[lastlight]

I think the 150 and 250 fire as intended on hqi ballasts whereas the 400 is meant for electronic. I also think many run the 400s on hqi and claim the colour is even better but they burn out really fast.

[Tracey2]

I read that too and saw a picture with the hqi ballast and the colour is amazing. Can anyone post a picture with the ANSI M135/M155, galexy or other options, thanks