... , 3X1W, 5X1W, 7X1W, 9X1W, 12X1W, 15X1W, 18x1W, 21X1W, 24x1W *SMD3528 chip High brightness LED downlight series: 1.5W, 2W, 2.5W ... Materials control 2. Sample inspection: Product appearance access, component (LED chip and driver)test, finished product test(voltage, current, lumen flux ...