Although the MH started, it was a fire risk, so I had to make a quick decision, and in went the Helios 6.
It's too early for 600W HPS.
The bulb broke probably because MH bulbs should not be dimmed... either that or a dodgy union between glass and screw on the bulb.
Anyway, for the purposes of this forum...
I'M BACK ON LED !!!!!!!!!!!!