Thanks so much everyone!
I shoot a Canon 60D today.
Light painting is an art form that requires a large light source and some practice. Shots are usually about f/8 and 30 seconds with ISO between 1000 and 2500 depending on how far away from the subject the light source has to be to get the right exposure.
Longer than 30 seconds you get more than a little blur on the stars, and begin to get streaks.
There have been occasions when I have run on to other people attempting the light painting with small LED flashlights on these huge arches. It just isn't enough firepower. I wait for them to be done, and when they are done, I begin with a test light on the subject to get focus locked in and tripod set like I want it.
When I turn on the light to get a focus, they often exclaim, "WOW, how big is that light!?!?!?" I can light it up from 50-100 yards with no problem.
The spotlight is good for about 20-30 shots, and the battery is down to needing a charge.
So, when limited to 20-30 shots and some trial and error for exposures and some of the subjects being so large that you have to shoot it, look at what you got, shoot it again, look again....and then stack the exposures to show the subject fully light painted by merging in Photoshop.
Some of the photos are hours of work in the hiking and shooting, and hours more computer work in the processing to the final shot.
I am so pleased everyone has enjoyed the photos!