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HPS guru's question.


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Thinking of moving my set up which has a 600hps but it is a hotter part of the area.
It's an old HPS light with an old ballast a mate gave to me.
It hums like a bastard when it turns on.

Anyway I read somewhere on this forum that the new "digital" ballasts are cooler.
Does this mean the actually outside ballast is cooler( which is what I suspect) and/ or it is cooler inside the tent as well compared to what I assume is my "analogue" ballast?

Also would it be quieter when It starts up as well?

Thanks for the serious replies.

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