Think he meant germinated, not sprouted, i dont think they're under lights yet, however this is good advice for when you do plant them!Keep lights close so you don't stretch them.
Im trying this next myself because even after 2 of my seeds showed taproots they didnt sprout at all and had to be trashed.Have you tried the greenhouse method of germination?
Put seed in cup of water for 24hrs, then plant the seed in soil, soil should be damp, and cover with plastic. Once the seedling sprouts you can remove the plastic.
I used this method the second time I germinated and got an 95% germ rate vs the paper towel method(60%). Just a suggestion.