Ciata Lighting 2x4 LED Ulthra Thin Super Bright Flat Panel 50 Watt 4000K White Frame (2x4 - 2 Pack) 2X4 led flat panel fixture provides a modern alternative to the traditional 2x2 fluorescent troffer, reaching up to 105 lumens per watt. Environmentally friendly-mercury free It is available in 0-10v dimming or step dimming with 5 years warranty. The FP led flat panel lights are ideal for replacing existing fluorescent luminaires. they are perfect for flush ceiling lighting, suspended lighting, drop-ceiling lighting,such as corporate offices, manufacturing facilities, architectural settings, hotels and hospitals. ETL & DLC Listed, LM79 Report, Suitable for Damp Location.