Hmm I wonder that too. It's probably a best-situation rating. Like how F32T8s are rated for 28000 hours. Yeah, i don't think so. The full mercury ones MAYBE, but the eco-Crap out there now? Forget it...
yeah. I wonder if they could invent an IS ballast that start off with a lower OCV and the OCV increases a few seconds after starting. I wonder if that would be enough to help increase life?
Yeah I was thinking 70s too.