We did work for a client that had a neon that swirld around his basement cieling. It caused his phone system to have an awful buzz on some phones. There was nothing we could do. we tried everything, and lost alost $4,000 trying to fix that damn buzz. It just made a lot of noise, and we couldn't insulate the waires enough. Not to mention it was a 13,000 Volt neon. It wasn't even leagal for a house. Good luck!