Cheers for all the replies , help and knowledge guys, it's very muchly appreciated and thank you. Anything that will help prevent a nightmare situation and gives you abit of peace of mind is great, I still cannot believe what happened today and I don't like even thinking about it I've ditched the magnetic stuff and gone with digital now, I've also got them well away from anything flammable and on a metal tray so if this ever occurs again it will contain the fire and not spread. Myself and my son's bedroom's are upstairs in a two story home and my grow room is below, we would of been trapped , the windows are the thin type so we wouldn't of even been able to escape. I thank god I awoke the moment it started .