xtf2015 Super Bright Ultra-thin LED Panel Light Ceiling Lamps Recessed Light Fixture Kit with Led Driver-15W Square, Warm White 3000-3500K, 7.5"x7.5" IMPORTANT NOTE: Please consult a professional technicial ot install this product. Refer to the 'Product Description' section for general troubleshooting. Contact the seller / Amazon seller support for any issues and clarification Outer size: Square (190mm * 190mm). Open Hole: Square (180mm * 180mm). Safe and easy to install, no warm up time required, no noise and no flickering, no IR and UV radiati Package Include: 1 * LED Panel + 1 * LED transformer Operating voltage: AC85V -265V. 100,000 hours lifespan 75pcs super bright SMD 2835 Led; Well-controlled beam angle, energy saving light.