The Magnetic Retrofit Bar Kit (MRBK) installs into existing troffers without the need to enter the ceiling space, giving facility managers the quickest, most cost effective means of replacing outdated fluorescent lighting systems with the high efficiency and performance of LEDs. With options to select from two sizes (2? and 4?) and in combination with a Multi-Channel/Multi-Output driver, this kit can be ordered in 1, 2, 3 or 4 bar combinations to replace almost all office lighting needs. With a easy to install magnetic back, MRBK typically takes less than 10 minutes to install.