That is not Scotts topsoil, that is cedar bark mulch. Your seedlings are fucked, start over.

Topsoil can mean about anything- it's meant to patch up the lawn. You need a seedling starting mix with no ferts.
Cedar chips are for keeping the ground clear under your shrubbery and have NO PLACE in an indoor grow. That is what killed your seedlings, not the light, which is adequate but could be increased if you have temps under control.

You really should read the link in my sig. That stuff is important.
stinkyattic Reviewed by stinkyattic on . Stinky please help me.... My seedlings seem to keep failing at the same point in growth out of 3 tries now. Right when the second set of true leaves starts to emerge all hell breaks loose. This time around there was some slight discoloration, then I put a dome over it to up the humidity since it stays 16% in the house, or so my gauge says. Then the browning got worse, and the new growth started showing brown. The first pic is at day 9 from sprout, and the 2nd is today and the 3rd is from about 10 min ago. Its going Rating: 5