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SUMBAO replace tube light with led In the production of replace tube light with led, Dongguan SUMBAO Lighting Technology Co. Ltd places a high value on quality control methods. The qualification ratio is maintained at 99% and the repair rate has been greatly reduced. The figures come from our efforts in material selection and product inspections. We have been partnering with the world-class raw material suppliers, making sure that each product is made of high purity materials. We allocate a QC team to inspect product at each stage of the process. recessed lighting without can,outdoor recessed light covers,square recessed light conversion kit.