Mazda Natural tube afterglow

As I tested the 6 Mazda Naturals, two things were picked up, the first being how much they seemed to struggle to stabilise, signifying lack of use, which would also explain how all 6 remained with the fittings this long. The second was the orange, almost yellow afterglow immediately after I turned them off. I decided to have a play about with the camera and see if I could actually capture the glow, and after much trial and error, managed to get the perfect shot. Its surprising how warm the afterglow is considering how cool the light output is.