Just a quick note this time – this one’s a fairly old article, and from a quick look at this researcher’s work it looks like he may no longer be pursuing this exact line.
Light therapy for Seasonal Affective Disorder is normally associated with absorbing bright light through the eyes. This article seems to at least hint at light transmission into the skin – for skin is far from completely opaque, as anyone who’s tried to make a realistic skin texture in 3d computer graphics can testify – having an affect on winter blues. The haemoglobin in our blood is light sensitive, and can act as a messenger to our brain, according to Dan Oren of Yale University.
It makes me think of pictures I’ve seen of brave or masochistic russians sunbathing in moments of midwinter sunshine – perhaps there’s more to it than bloody mindedness.