Thanks for that link Hoop! very helpfull especially the info in the beam throw table at the bottom showing the scale up through cd, to kcd, to mcd, which was the missing link which enabled my understanding of the equations.
And to member -Xxo here is a link to the graph I am referring to ,posted by member Enderman Most Powerful Flashlights in the World (by throw distance)
I believe my other dilemma concerns the huge variance in measuring distances that some of the members of the community may have used when posting their end results for lux which kicks off the whole process for the correct ultimate answer to the
Cd,kcd,mcd end result equation and it’s final answer.
I know from my own personal experience with a quality light meter and full charge any one of my torches may give a different end result at different distances using the same chain of equations, so what to do about that, I don’t know, any suggestions appreciated?
Thanks very much