Thousands of different parts and components exist for lights and fixtures. They include modular parts, dimmer controls and switches, knobs, chains, and cords, electrical pieces, track lining, and more. While some are precise to various models of light fixtures, most are considered an option or matter of preferred aesthetic.

Keystone's model KT-ADAPTER-E39-E26 is sold in multiples of 1. It comes with a standard manufacturer's warranty, and its UPC is 843654124285.