[herlichka]

Just a footnote about colour temp. Next time you're in a supermarket look up, most of the fixtures will be equipped wth CW (cool white) flourescents, but over the meat department you'll see WW (warm white) lamps: meat looks dark brown under CW lamps! Retailers in various sectors will use a blend of lamps with different colour temps to their advantage.
In the home colour temps can change the look of paint on the walls, upholstery, and even clothing, an item that looked nice in the store may look completely different at home.

You can use the warmer lights to do just that, psychologically, you can "warm up" your living spaces with the right lighting, it's all about perception.