I would like to point out that the source, the daily mail, is a joke here in britain and it has a diabolical track record of science reporting. It is aimed at middle class women and as such will hype any science story that could be seen as a way for mothers to create an advantage for their children over other people's children.

For a catalogue of the Mail's scientific failings, including the fish-oil saga which was very similar to this story, see here: http://www.badscience.net/category/media/papers-mail/

I posted this because I wanted to see if anyone had experience with this sort of thing first hand. I've seen daylight lamps before for SAD but nothing like this.