at my local walmart they actually go through the bulbs pretty fast. i always browse, and 3 out of 4 times they will be sold out of bulbs. i also start the bulbs in a gallon jar with a desk light pointed down over it. lets me keep track of the bulbs, keeps fish from eatingt them, and keeps fungus out of the tanks. as soon as i see a sprout i move it to the main tank. i don't use ferts, so my aponos are staying pretty small, but i also let the runners grow for too long. they make a nice kind of ground cover that the cories and tetras hide out in, and that's fine for me because i have plemty of hornwort for height.