Thanks, Electricmanscot.
Redsy, thanks for the NM-B info. I wasn't sure about how it all worked out, but I figured I'd just pass along my guesswork and see if anyone would correct me on it. I know in normal can lights, the j-box is away from the heat (with 18" of high temp wire leading to the socket), and so NM-B wire is ok. Without seing one of the "commercial electric" models I didn't know if the same type of wire could be used.