... :30-50K Hours 4FCC/PSE/CE certificate 1, LED Down lights Features1.Green Illumination: No strobing during working ... lifespan: Toppo introduce the advanced thermal management technology of LED from Japan. The light decay of Toppo products is ... time(hours)Lumen decrease(%)10000%20000.5%30000.8%40001.4%50002.2%60003.1%3,Application ... City,Buildings,Plaza,Hotel,Offices.,etc 3-8 inch (5-20W) LED Downlight