Interesting timing.....Just this morning I put a 60 watt full-spectrum bulb above the computer desk. My wife (Ferrara) got 2 of them when she got a fancy desk model for her writing desk. She had borrowed one last year and thought it helped.
(I am notoriously hard to convince, and usually don't 'feel' the differences when taking vitamins and using light therapy, etc....but there are many studies showing why it should make a difference, so I will pop my pills and turn on the light.....*smile*...we shall see.)