Alrighty here we go. As some of you know my 400W Diazo metal halide lamp is cycling, IDK why. Thought it was maybe meant for increased CWA capacitance to run at 500W, that is probably not the case. I have tried it in vertical and horizontal burning positions. Here are the specs I measured:

When the lamp strikes, the voltage is around 15V and the current is around 3.5A. The voltage slowly climbs until it cycles off. But the voltage it reaches before cycling is only 30V (only a few seconds after switch-on). I am fairly certain these are accurate RMS measurements.

Compared to the >300VOC of the ballast, 30V is a 10:1 ocv to lamp voltage ratio, which makes it very very odd for it to cycle off because i would expect it to do that at 150V or more. The capacitor checked out fine.

Anybody have ideas? At my wits end with this thing