How funny. I've done that before too, I call it a rescue. Here's an older post from the Growing from Seed Forum that has a lot of comments that look helpful. Recognizing the good seed from the duds is interesting and they give sowing temps etc. Good luck.

Here is a link that might be useful: http://forums2.gardenweb.com/forums/load/seed/msg1116072610021.html?32

Thank you for the link. There was a lot of information.
The last person suggested putting the whole flower head with seeds in the soil and transplant those that show up. No follow up on how that went. I have a grow light I may try putting the seeded pots under it. Worth a try.

I would split them open and cull out the good seeds if it was me. Are you talking about the person sowing laitris seed heads? Thats a wildflower and he sounds like he's direct sowing plus those come up real easy.

Looking at the pictures on the seed forum, there was a lot of difference between the viable seed and the sterile duds. From what they posted, it also sounded like the seeds need a bit of controlled conditions so your grow lights sound like a good idea. I find it helps to put a baggie over the pots until the seeds germinate, keeps it nice and humid. A common snack baggie fits really nice and snug on a 4" pot. Take them off after they come up or just cut the top open for some ventilation until they form their first set of true leaves.