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In 2011, China lighting appliance industry produced 19.61 billion electric light sources (up 4.0% year on year), including 4.17 billion incandescent light bulbs (a 3.8% yr-on-yr rise) and 3.32 billion fluorescent lamps (down 1.40% from a year earlier). By output, Jiangsu, Guangdong, Zhejiang, Shandong and Henan ranked the top 5 in 2011, with their output totaling 14.98 billion units, accounting for 76.39% of the national total.
China Lighting Source Industry Report, 2011-2012