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Mh And Hps Balast


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The difference between the two is that one operates a MH bulb and the other operates a HPS bulb. The reason for the different ballasts is just as Bubble stated, they have different firing methods to get the bulb fired up.


Most of your newer ballasts, be it magnetic or electronic, support both MH and HPS. Most of the newer magnetic ballasts are what's called "Switchable" and it literally means exactly that. You can flip a switch for either MH or HPS. Most, if not all of the electronic/digital ballasts (very few older electronic ballasts have switches) are just plug and play, no switch required.

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