1.High Luminous efficiency 2.Lifespan: 50000hours 3.Certification: CE, RHOS, ... Self-developed Q-lights: low optical decline, high illumination, high efficiency,and patent led source. 2.Light source arrays to form ... 25 wattages. 5.Heat sink was made of high quality aluminum alloy ,by the treatment of coating. ... ensuring a long Life time:50,000hrs LED PL lamp,Ladder-shaped Housing Sets,with latest design