Folks, if you've recently upgraded or renewed your annual club membership but it's still not active, please reach out to the BOD or a moderator. The PayPal system has a slight bug which it doesn't allow it to activate the account on it's own.
I don't see why not. Electronic ballasts can usually light almost any bulb. The price is sure right. I did notice that the max tamp for the ballast is something like 158 degrees, so you may want to mount them rather far away from the bulbs.
If you are in doubt, order one, install it and test, and if it runs ok, then order and install one for all the other MHs you have.