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About product and suppliers:
        Alibaba.com offers 1,555 hps 400w bulb products. About 22% of these are led bulb lights, 21% are high pressure sodium lamps, and 5% are led street lights. 

A wide variety of hps 400w bulb options are available to you, such as plant growth, road. You can also choose from free samples, paid samples. 

There are 1,555 hps 400w bulb suppliers, mainly located in Asia. The top supplying country is China (Mainland), which supply 100% of hps 400w bulb respectively. 

Hps 400w bulb products are most popular in North America, Western Europe, and Domestic Market. 

You can ensure product safety by selecting from certified suppliers, including 434 with ISO9001, 110 with Other, and 27 with ISO14001 certification.