I have neglected to enter the results of my last testing, which was in mid July. I still had lily bulbs dug from last fall (9 months previous), and they were still in remarkably good condition. I had kept them inside a thck walled styrofoam cooler in an unheated garage through the winter and summer here in USDA zone 4. So outside the cooler, temps ranged from minus 23°F to 98°. (We had a very mild winter and summer this year.) Apparently, I must have hit the "sweet spot" for hydration/dehydration, as there were only a few that had wanted to sprout.
Eaten raw, the texture was not as pleasing as fresher, more crispy ones tried before. Being not full hydrated, these were (understandably) more flexible, although I would not call them rubbery, since there was still a breaking point when they snapped, and they were not tough (or stringy) at all. Cooking seemed to be identical to fresh bulbs. The bulbs were still very sweet; if anything, even more sweet than before.