do you have some sort of fan pulling out all the stale air from the area?

normally i keep seedling about 2 feet from the light for the first couple days then move the light closer daily until i see them wilt a bit then raise it about 3" from there.

the fan you use may be to powerful for the seedling so dont put it right in thier direction, i know the fan your using i have about 3 of them in my shop and they throw HUGE amounts of air even on low.

seedling can take up to 7-10 days before they show through the surface, all my seeds popped one time except one and it took 4 day for it to show up.

what size area are you working with?