You might try one of those battery backup line conditioner setups to see if it removes the interference.
killerweed420 Reviewed by killerweed420 on . RF interference I have a 250W MH digital ballast light that, when plugged in, causes one of my TVs to go loud static. Is there some kind of simple shielding or should I just replace with a magnetic ballast just to make sure? An article I saw suggests this is RF interference some digital ballasts can cause with radios or TVs. Don't know. Rating: 5