Product description says "449-WH can be used with IC44N/IC44W/IC44S/TC44/TC44V/TC44S/TC44R chassis." I have an IC44N chassis. IT DOES NOT FIT! You will need an adapter ring, Juno part number 4TSA. Juno replaces the original housing's spring-loaded wires with force-fit circuitry, and the point here requires that you have newer force-fit housings to work with. If not, buy an adapter. Thanks for the info in the description! According to the description, this lamp is to be operated with a "Halogenβ¦