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About product and suppliers:
        Alibaba.com offers 667 metal halide 400w ballast products. About 53% of these are ballasts, 1% are energy saving & fluorescent. 

A wide variety of metal halide 400w ballast options are available to you, such as magnetic, electronic. You can also choose from active, without. As well as from high intensity discharge, high pressure sodium. And whether metal halide 400w ballast is free samples, or paid samples. 

There are 582 metal halide 400w ballast suppliers, mainly located in Asia. The top supplying countries are China (Mainland), Saudi Arabia, and Philippines, which supply 99%, 1%, and 1% of metal halide 400w ballast respectively. 

Metal halide 400w ballast products are most popular in North America, Western Europe, and South America. 

You can ensure product safety by selecting from certified suppliers, including 161 with ISO9001, 16 with Other, and 5 with ISO14001 certification.