A purple glow from special interior lights sets Lightbar apart from stores on each side in Portland, Ore., Thursday, Dec. 19, 2013. Designed to mimic sunlight, light boxes are now being featured at a bar in Portland and a cafe in Seattle to help those with seasonal affective disorder, or SAD, an energy-sapping depression that occurs at the same time each year and affects an estimated 3 percent to 5 percent of Americans. (AP Photo/Don Ryan)PORTLAND, Ore. (AP) — Saturday marks the shortest day of the yr — the head of dread for individuals who feel depressed when there's much less sunshine. Once they go out for a drink or espresso within the dreary wintertime Pacific Northwest, they could also order up a dose of one thing else fully: a number of rays of bright gentle.