Hello, I am an experienced night photographer. With some issues.
I am doing a lot of things and trying to get some results that aren't happening right now.
I am shooting 4x5 film night landscapes and using flashlights, specifically a ledlenser light to paint my scene. I have not been able to produce an image with light painting right now. Any suggestions? or How to determine the duration of flashlight use when shooting for over 10 minute exposures?

p.s. as you can see im not as experienced in light painting :-p