Update:
Finally got delivery of my new drivers. A pair of HLG240H-C2100A. I shut down the light, got a pair of boards re-wired, and fired them up. 320 Watts from the wall!! And learned my lesson, I'll never buy another A driver! What a pain in the ass to get adjusted. And I could only get it down to 215 watts. Which is fine, my other Diablo light pulls 420 watts from the wall as adjusted, so I can live with 430 watts for this one.