The above image is a motion gif of a luminous hickory nut shell showing the transition from room lighting to total darkness. This posting will explain how it was done.
Background:
One evening while walking through a small section of woods my wife noticed something glowing just off the trail. The object turned out to be hickory nut shell with some kind of luminous fungi or bacteria causing it to glow. We took it back home with us to take pictures. Since I didn’t know how long it would continue to glow I did a very quick photo setup by placing the nuts on a piece of white paper in a small dark room and mounted my camera on tripod.