2x2 FT Ultra Thin Edge-Lit 40W LED Flat Panel Light Residential Flushmount Surface Mount/Commercial Drop Ceiling Dimmable Ceiling Lamp Fixture 4200lm ENERGY SAVING - Energy Savings of up to 65% over our product's lifespan. Rated over 50,000 hours of use, that's about 23 years @ 6 hours/ day. QUICK AND EASY INSTALLATION - With a high quality internal driver, this panel light can be surface mounted without a mounting kit. HIGH PERFORMANCE - A smooth PMMA cover allows for uniform light output at a stunning 4200 lumens to replace old fluorescent tube fixtures. WIDE APPLICATION - Widely installed in home, hotel, office, meeting room, show room, hospital, supermarket, schools, etc. DIMMABLE - 0-10V dimmable. Our lights high quality driver allows our light to dim without any unwanted flickering, flashing or humming noise.