Write to ReefBrite. Their website and at MACNA, they were invested. Perhaps it is a supply chain issue (tarrifs are affecting this stuff, especially from EU) and they can point you to another supplier.
Any pulse start ballast of similar wattage will fire a HQI bulb, but that does not mean that you should do it.
Any pulse start ballast of similar wattage will fire a HQI bulb, but that does not mean that you should do it.