Led down light 1.Dimension: 3-8inch 2.LED quantity: 5-20W 3.Life Time:30-50K Hours 4FCC/PSE/CE certificate 1, ... is above 50,000 hours.2LEDs Lumen DecreaseTesting condition: testing for light work lasting Operating time(hours)Lumen decrease(%)10000%20000 ... .5%30000.8%40001.4%50002.2%60003.1%3,Application area Available for City,Buildings,Plaza,Hotel,Offices.,etc 3-8 inch (5-20W ...