The Nelson Ball Wall Sconce is part of the Nelson Bubble Lamp series. A walnut wall mount and steel arm suspends the spherical shade and lets the lamp fill any interior with a warm. diffused light. The lamp's arm can be adjusted from left to right and up and down without having to change its position on the wall.Handcrafted in Michigan. U.S.A.Features Nelson Bubble Lamps collection Part of the Herman Miller Collection Designed in 1952 UL Listed Color: White Each sconce has 12-feet of cord and a counterweight for height adjustments Each sconce features an on/off pull chain with a solid walnut end cap Care and CleaningIn most settings the lamps can be cleaned with a feather duster or a soft cloth. If they become grimy. the process will be bit more complicated. We suggest cleaning them with a mild soap solution (a little ivory dish liquid in two quarts of lukewarm water. for example) and a soft cloth. To remove the soap. wipe with a clean. damp cloth and dry with a soft rag. Stronger solutions. like a glass cleaner containing ammonia. could discolor or damage the plastic coating.