WHO, WHAT, WEARABLE Alive Sunlight/UV Tracker We’ve test-driven a couple of wearables that let you know when you’ve had too much sun. But the new Alive Sunlight Tracker also tells you when you haven’t had enough daylight—a state that, if chronic, can lead to depression and a nasty vitamin D deficiency. The device monitors sunlight exposure and UV intensity, making users more mindful of their optimal exposure to sunlight. Users access a simple proprietary app to check their daily exposure levels. What We Liked: The device is convertible—it has a strong magnetic clasp that clips securely onto a shirt or dress top, and also comes with a matching adjustable 23-inch necklace chain. And the tracker is medically backed—GoodLux is owned by a group of Harvard professors and researchers.  What We Didn’t Like: While the wearable’s front sunlight graphic is pretty, i