I Would use one of the little "muffin fans" available from surplus
stores, electronic supply stores, etc. get a 2 or 3" fan and duct it
so that you get good cooling of the bulb--there are lots of light wt.
headlight assys. on the newer autos, and you can find a little peanut
sized halogens up to 100 watts--but you need good connections and
probably a glass lens (too hot for plastic in my opinion)---Jerry
Lou wrote:

I'm in the middle of assembling my wings on a wooden airplane, any
reason I can't use hologen car headlights in the leading edge?
Lou