Lithonia Lighting PT2U MV Silver 9-Cell Volt Parabolic Troffer, 2-Feet by 2-Feet Energy-efficient fluorescent technology Low-iridescence metal louvers form 9 cells that direct light downward A black reveal frames the louvers and provides a floating appearance Requires two 32-Watt U-bent fluorescent bulbs (sold separately) Designed for open area locations where visual comfort is important