Growing Chilies

I'm 5 month late to start growing chilies, but I am going to try ones. Somehow I strayed to Fataliiseeds webpage and decide to order some different kind of chiliseeds.

Chili seeds came by post faster than a week. I put them in the light weight lava sand onto the radiator. It's the most warm place on my apartment, about 25 °C, everywhere else there is only 20 °C.

Now after one week from seeding, the thirst seed leafs push oneself straight on the sun. Unfortunately there pass too slight sunlight through my windows. There are other high buildings and trees behind.

Let see how to succeed?

PS. The picture above is made by Pixelmator:
three layers from different photos and
the glass of the magnifying glass made transparency
where to the lens effect added by gradient tool.