Replacement for fluorescent tube lights; high brightness 1800 to 2200 lumens; quality construction; 50,000 hour life. Cardinal Linear Lights are high quality replacements of standard fluorescent tubes T8 and T12 and provide electrical savings of 35 to 50 percent. Installation is easy, these linear lights use the same terminal connections as fluorescent tubes, and a universal power supply inside the light eliminates the need for a ballast. These linear lights use surface mount diodes to provide 50,000 hours of lifetime.