Dude, what Kinda yields do you get with 2 of them?OK
But everything you need to do to make the econolight into an effective grow light I think is easier than building a box to quiet a noisy ballast.
Up to you, but getting 2-3x the number of lights for the same price and dead silent without needing to quiet them.... Seems like a no brainer.
I use two of them and couldn't be happier. Great deal and really simple to mod in any way you might like.
just my opinion...