As some of you may know, I have a Sun GDM-FW9010 from Korea. If anyone has played Alien Isolation, it is a very dark game. When there is something bright white like a light on a true black background and I look around in a spiral for instance, I can turn off the monitor and still see the spiral glowing and it takes forever to go away. The light 'tracers' make the game unplayable because it's very distracting. Hopefully that makes sense. Any ideas what is going on? Is the phosphor not aging well? Is there a way to tell how many hours or the age of the tube?
As Ashratt said, it's phosphor persistence, which you can't really control. I would recommend doing a white point balance, which involves calibrating peak luminance. Perhaps your peak luminance is too high, which may exacerbate the problem.