LED BACK-LIT FLAT PANEL comes with a unique design, anti-corrosion aluminum frame, and a 0-10V dimmable driver with circuit overload, short circuit, and low-voltage protection, making it both safe and reliable. The non-yellowing PC diffuser provides uniform light distribution. You can choose either 4000K or 5000K color temperatures. The fixture comes with 120-277V and in 2x2 and 2x4 sizes. With a calculated lifespan up to 179,000 hours, these fixtures are made to last decades under normal operation! ASD provides a 5-year limited warranty along with UL and DLC Premium certifications to guarantee top-quality products and safety.