I used to have some several years ago that I bought from another member of this forum. I ended up getting rid of them when I needed to simplify my life a bit. Kind of wish I had them back now. Mine never did get real black, more like a black background with black bands (you could still see a pattern, like two different kinds of black) remember that they need to be kept cool. Mine seemed to do best with no supplemental heat, just the ambient heat of my herp room.