Plural of anecdote doesn't make data, but I've got one for you in any case: I used to suffer quite badly from winter dips, I've since installed a IKEA Floalt p

Plural of anecdote doesn't make data, but I've got one for you in any case: I used to suffer quite badly from winter dips, I've since installed a IKEA Floalt panel right next to my desk. I turn it on when I sit down and turn it off when I'm done for the day. I run it at full brightness at the medium color temperature (which is still fairly reddish in my opinion). Since then it definitely seems that my winter dips have gotten significantly less severe, though actual sunlight still seems to work better. Now all that said I'm aware it might just be a placebo effect, but honestly if a placebo stops me getting all gloomy I'm all for it. To me at least it seems that my winter dips are heavily influenced simply by environment brightness.