When do you use the various light techniques?

I am an amateur, hobby tracker. I primarily do animal tracking as the opportunity presents itself.

I have read the Tom Brown Jr. books and do carry a hiking / wading staff that I equipped with sliding, elastic marker bands to record track length, track width, stride length, etc. of tracks.

Like all nature observation in my experience, I find that remaining in place and patiently looking often reveals other, smaller, more subtle tracks that have been right in front of me all the time.

If lighting techniques allow faster or better tracking, then that would be great.