Although it seems daft now getting the wife used to uk temperatures was helped by using the AC so it felt like a fridge, it helped the Wife or at least her body get used to the Idea that a body could be in an enviroment that cold.
It was that or sit her in the fridge.
With regards daylight bulbs although not ideal for serious cases are worth investing in. We used them at work back 03-04 and made such a difference that i bought some when the Wife came over.
no scientfic data or research but a gut feeling that it made a difference. Particularly te first winter and on days as we are having now with all the gloom