Give them time to come through the soil. Most seeds take from 3-7 days to break through the soil depending on heat, moisture and how far down you have planted them.

I dont think that halogens are sufficient for growing. I've read off other threads that to do anything they need to be really close to the plant but as they get so hot when on for long periods they will burn them.

Once they come through the soil get some floros or an HPS on them. Floros are pretty cheap and easy to get hold of and you can still get good results.