... light degradation 5. 4 years warranty Hottest high power led 50w 10000kSpecification:Power:50wattCurrent:1750mAVoltage:30-34v Luminous:5000-5500lmLife ... degradation:2‰ over 5000hrs continuous lighting Raw materials: LED Chips: Formal USA Bridgelux or Formal Taiwan Epistar chips ... 3w, 5w, 10w, 20w, 30w, 50w, 80w, 100w 200W 300W high power led diodeAvailable chips:US bridgelux,Taiwan Epistar45mil,Taiwan ...