The Nelson Ball Bubble Wall Sconce by Herman Miller are iconic pieces of mid-century modern design, and are so beloved that they can be found in the permanent collection of the MoMA in New York. Made with a spray-coated plastic originally made for the military, the Nelson Ball Bubble Wall Sconce features a spherical steel frame that is slightly visible through the shade. The shade is attached to a Brushed Nickel Arm and Walnut mount, and is adjustable left-to-right and up-and-down with the help of a long cord and counterweight.