I didn't see that. That first post is kinda confusing, but if the leaves are all brownish, if that is the case, I don't think they have any chance so I would still cut them all off and take my chances with just the rhizome. I did this a few times with Bolbitis and I grew some incredible pieces, but again that was with co2 and good light.I would agree with you... except the OP said there's only 1 leaf per rhizome (which is part of why I was questioning the source of the plants, b/c I personally wouldn't send out only one leaf on a rhizome...)
I think a 9 watt bulb may be OK for a 5gal tank if it's a tube or U-shaped bulb. Probably not if it's a spiral, though. And sounds like the bulb probably does need replacing.