From looking at the picture on the 1st reponse you got, you can see what the lamp looks like. I got mine at Lowe's. It was in the electrical isle next to the extension cords. It looks like the trouble lights that guys use to work on cars in the dark. It has a metal dome shape and an clamp on one end of it. The clamp is so you can hang it & point it where ever you need too. I think mine was around $12 to $15.
Then you can go look at the light bulbs, also at Lowe's. I found mine on the bottom shelf, but Lowes does indeed have heat lights ($4 - $7). Some of them had pictures of chickens on them. Just find a sales rep in that area and tell them what you need. They will show you where they are. I had a bright heat light for in the house/brooder right after they were they hatched, up until 4 weeks old. From 4-6 weeks old, I put a regular light bulb (in the lamp) in the brooder with them. Then I moved them to the coop and put a red heat light in there with them. I leave the red heat lamp on all the time in the coop for extra heat and a little light. They seem to really like it. Once the winter is over, I will remove the red heat light from the coop all toghether.
Hope this helps. You can also google it and read up on all the different info out there. But in the end, you just need to use your best judgement and keep a close eye on your chicks to see how they are responding to the heat and the light. If they are laying right under the heat light all the time, then they are cold. If they are staying away from the heat light, they are to hot and it needs adjusted.