magnetic house

I built this room on my house out of steel. It has gone magnetic with the pull of a very strong magnet. I think I hit the sweet spot and am wondering how I can capitalize on it. It has a 240volt led light in it and when it is switched off it glows brightly on for some time.It has never been hit with lightening like the verandah in Gundagai and has more steel in it. When I get time I will make a video of it s magnetic pull. The construction is all welded.