Fine lighting design created with mathematical precision. Inspired by the tool of the same name, the Abacus 3-Light LED Multi-Light Pendant by Hubbardton Forge has 3 glass spheres that can be moved up or down slender low voltage cables to create a desired lighting and decorative effect; simply pinch the side grippers on either side of the shades to put things in motion. In an entryway, on either side of bed or sofa, this multi-light pendant provides bright ambience and geometric beauty.