My first set of chicks, I used a heat lamp. Never again. I had it securely attached, so I wasn't worried -- much -- about fire risk. However! Our electric bill was up $30 that month. The heat plate was $45, IIRC, but much safer and cheaper to use.
Plus, it didn't make everything red! :gig
Here's a picture. It worked really well. If I brood chicks (ie, don't have a broody hen), I will do it this way again. You can just see the heat plate on the right side of the crate. And cute chicks in the mirror. :)
You can see that the cardboard is bent/wrapped around in the corner. It's just...
I use an XL dog crate for brooding, and I line it with cardboard. That keeps the chicks from getting out between the bars when they're tiny. I round off the corners though, so none of them can get stuck there and trampled.
:pop Following, just to see the cuteness! I will get more chicks in a few months (how long till April!?), but chances are they'll be purchased sexed pullets.