MH Ballast help

[GreenSpottedPuffer]

Originally Posted by parkinsn

If your going to keep it in a box and its humming still, something you can try to dampen the vibration are hockey pucks or you can buy actual transformer (thats all a ballast is) vibration plates but they are virtually hockey pucks

Ok, thanks.

LOL...I am confused though. Where would I be putting these hockey pucks? Just under the ballast?