First Recorded Grow- 8BK and BlueBerry

I'm quite satisfied with the way the seeds have sprouted, the Blue berry had explosive growth just 2 days after being germinated and I think they'll be happy in their new home. the tent has been bleached and rinsed, as has all the growing equipment/pots. I don't wanna add nutrients yet as I speculate they're still far too young and it'd hurt their little roots, but there should be enough nutrients in the soil I'm using. looking at installing a small fan in the tent and looking at buying humidity/temp meters. Not sure if the three light heads(LED) are 15w each, or all 3 are 15w together; either way while they're sprouting up I've put one light head on each tray.