A 32 inch discharge to clear lightbulb.  Unfortunately, the corona inside the lightbulb dosen't show up too well.  The coil was running 5 gaps @ .030" .0185 uF poly cap in parallel with .007 uF salt water cap.

100 ASA Kodak Gold, expose in total darkness, 2 second coil run time, illuminate secondary, toroid, and lightbulb with flashlight, black background.