I have a duel 250 Watt magnetic ballast that i would like to sell so i can buy an electronic. I cant see any markings on it but it is currently on my tank running my two 20k. Dont know how much its worth but i would like to get 100 or so out of it since the new one will cost me over 200. Shoot me an offer though if anyone would be interested. And i would have to buy my new one first this is kinda a test to see if it would sell. Thanks