... ,000 hours 4.Aluminum alloy frame 31W High Power LED Industry Lamp with Nichia LEDs, 2,508lm Key Specifications/Special Features: Power ... 165 x 174.5mmNet weight: 0.54kgGross weight: 1.2kgWarranty: three yearsLumen depreciation: 5,000 hours less than 4% and 30 ... ,000 hour Mission: Make customer life easier. 31W High Power LED Industry Lamp with Nichia LEDs, 2,508lm