Shenzhen Number Energy Saving Corporation (NESC) found in 2003, contribute in design, produce, and sell of electronic ballasts of 1000w, 750w, 600w, 400w, 250w, 150w, 100w, 70w, 30w etc. With a rapid and steady development, NESC has a 2000sqm factory of 300 labors. Number is our proprietary brand. NESC professional R&D team independently develop the MCU, which is the key component of the electronic ballast, our own workshop also make transformers to ensure the best quality. More than 10 years of production team strictly following the instructions of operation, QC team double check every unit of ballast to reduce the rate as low as possible of defective product. The power factor of our ballast is bigger than 0.99 and bring out at least 30% energy saving compare to magnetic ballasts. Number E-Ballast series products have the approval of UL CE, RoHS, FCC, etc. We offer warranty of free replacement within 3 years. So our quality products have been selling to America, Europe, Asia, many countries and regions.