ALVA's Betty Wall Sconce Gets Historical at One Henry Adams. Historic name, modern design, ALVA adds elegance to One Henry Adams corridors. Resin shade material provides the look of fabric while being more robust than acrylic. ALVA's unique on-board 4 light level dial, LumenSelect™, lets you customize the light output of your corridors. Fully integrated emergency battery back-up available. ALVA's award winning Betty offers the industry's most energy-efficient commercial wall sconce.