A "small mass of roots"? Wow, that's more than I ever got, which was a single root per seed, and perhaps a few tiny root hairs. Bravo! And congratulations!
Temp should be 32-40F. Approximately. I don't think the bulbs will sprout green in the fridge at all, unless you leave them in for longer than 90 days. But they should be rarin' to go as soon as you bring them into warmth. I'm talking days here, and you will probably see sprouts starting if they are still in the baggie where you can inspect them closely.
You will want to check them periodically for moisture (too much or too little), especially in the beginning.
