Question about HPS bulbs & wattage

surfbolinas2008

Active Member
Hey everyone,
I recently purchased a 400w HPS builb with built-in ballast. It is an awesome light, except a little too powerful for my ~2'x3' grow box. It is quite hot in the box, even with ventilation, and the babies are shriveling. It is also quite loud so it is hard to sleep at night.
I was curious if I purchased a 150w bulb instead;
1) Would the ballast even work with a bulb of lesser wattage?
2) Would the ballast recognize the lower wattage bulb, and not use the same amount of power, hence lowering the noice it makes?

Any insight is welcome, thanks! :mrgreen:

 

dhhbomb

Well-Known Member
well i havent seen a build in ballast for a 400 but the ballast should not work each ballast is built for a specific wattage
 
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