BD4-48 is a four-sided barndoor accessory designed for SPECTRA48 and LumiGo FLOOD48 wash fixtures. It features four independent leaves that provide full beam control and eliminate peripheral spill, enabling sharp rectangular or square patterns for wall grazing, architectural accents, and precise stage lighting. This rugged, front-mounted accessory frames the fixture's output without altering color mixing or fixture performance, and is intended for outdoor use in demanding environments.