it can take from like 3 to ten days or so.. you can also just take them out from under the cfl's untill they sprout, and once you see signs of life, throw em back under the cfl's..
i usually germ mine in a paper towell first till i see the taproot appear, and then put them in my medium.. but you method works fine too, and there is less chance of screwing anything up with germing them in the medium..
i would say give them another week or so and see if you have any signs of life yet..
best of luck....