Having completed a lot of renovations up here in the cold canadian north, one thing I have found was that homes built prior to 1990's, had poor vapour sealing. One of the largest culprits is that are no vapour barriers on exterior wall plugs and ceiling lights. I found that expandable spray...
Aweswome shop, one suggestion , is to slip the flourescents into the stud spaces, and cover with safety glass. Easier to keep clean with a razor blade, and explosion proof, if sealed