the quicktronic is fine
... spectral shift will get you after 12 months anyway, so it's not worth spending extra $$$ on a fancy ballast to squeeze a few months out of a bulb.
for powercompact, or any bulb that is HO
, research shows the "Programmed Rapid Start" is the best way to insure consistant lighting of the bulb and maintaining bulb life.
PRS works by first pre-heating the filimants of the bulb and then ramping up the arc voltage, instead of just slamming 600v across the bulb to fire the arc... instead starts slow and works up. by slow, it's usually less than 2 seconds, but that is forever compared to a high voltage instant start ballast, like the quicktronic
since a powercompact is a small bulb, with small filaments, they 'may' not take the same amount of abuse a big T12 vho
bulb with a heavy duty filament will... so instead of lasting almost 3 years (20000 hours), they'll last maybe a year and a half... but this is where spectral shift gets you anway, having the colors degrade to the point where it's not longer useful to the animals that rely on it for survival.