Most lights come with a small note stating that they are not to be connected to anything less than 90C wire, or pre-1985 wiring.

This is usually found on the bottom of the instructions after the packaging and pre-cast foam enclosure is totally destroyed.

Sometimes there is a 'consult an electrician' disclaimer to be also seen.

I would like advice on the installation of these in an older (pre-85') 3-story home.

caution please.... loaded Q.....