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About product and suppliers:
        Alibaba.com offers 1,141,990 40w products. such as free samples, paid samples. 

There are 1,140,308 40w suppliers, mainly located in Asia. The top supplying countries are China (Mainland), Taiwan, and India, which supply 99%, 1%, and 1% of 40w respectively. 

0w products are most popular in North America, Western Europe, and Domestic Market. 

You can ensure product safety by selecting from certified suppliers, including 285,069 with ISO9001, 227,060 with Other, and 57,151 with ISO14001 certification.