[ceasesurthinko]

Good example of correlation and not causation.

I think you are definitely onto something here. I used to take 10k IU vitamin D a day and still felt meh, but getting a bright ass white light (2300 lumens) in my room has uplifted my mood, increased wakefulness, and boosted my general productivity alot. I used to have a warm Phillips Hue and I couldn't do any work in my room without wanting to nap.