blue light good!
These observations led to the discovery of an additional photoreceptor system in the retina of humans and other mammals consisting
of a small number of photosensitive retinal ganglion cells (called pRGCs). These cells are most sensitive to blue light, and, significantly, blue light is most effective in alleviating the symptoms of SAD.
Now that’s a nifty fact I didn’t know! I’ll keep that in mind when picking out paint colors and lightbulbs for our new house.