What’s the best way to make your outdoor space elegantly enjoyable after dark? With a lighting scheme as layered as your living room’s, say the pros. Here’s how. By Kathryn O’Shea-Evans LAST SUMMER, those of us charmed enough to have a backyard to call our own tended our gardens and zhushed our patios with new furniture, maybe even springing for an outdoor rug. When it came to exterior lighting, however, most people aimed no higher than a swag of Edison-bulb string lights an
