led ceiling lamp,new led ceiling lights 1. 2 years warranty 2. Lifespan: 50,000 hours 3. ... , hotel, museums, art galleries and so on.led ceiling lamp,new led ceiling lights Item NO.HCZMT-240*51-321SMDDescription:LED Quantity :321pcs ... :120°Protect Rating:IP54Working temperature:–20°–50°Storage Temperature:-10°-40°Power factor: >83%Light efficiency:80LM/WNet Weight/pcs:2kgMaterial ...