The low-profile ceiling troffers in the Metalux ArcLine LED Series by Cooper Lighting generate a natural, soft light. The dimmable luminaires use at least 40% less energy than a conventional three-lamp fluorescent troffer. Available in four sizes—1' square, 1' by 4', 2' square, and 2' by 4'—the fixture uses 3000K, 3500K, or 4000K LEDs with a color rendering index exceeding 85.