Lotus root questions

Hello! I bought this bag of lotus root just before Christmas, and I have no idea how long it lasts. I'd tried buying fresh lotus root, but around here I'd only found really beat up, bruised, shriveled ones, so I reckoned I'd try this. However, I'm wondering how long it keeps! I've posted pictures of the front & back of the bag here: http://www.flickr.com/photos/mosaica/ Any ideas most welcome :-)