... light degradation 5. 4 years warranty Hottest high power led 50w 10000kSpecification:Power:50wattCurrent:1750mAVoltage:30-34v Luminous:5000-5500lmLife ... BASE,high thermal conductivity ,reach 450k/m.w (copper only 300k/m.w Service from GMKJ: 4 Years quality guarantee ... 10w, 20w, 30w, 50w, 80w, 100w 200W 300W high power led diodeAvailable chips:US bridgelux,Taiwan Epistar45mil,Taiwan Epistar35mil,Taiwan ...