This test was helpful in many ways and much easier than in the film days. With film, if you made a mistake it was a pain to correct. If you make a mistake with digital you just erase one image.
It's important to keep track on what you're doing with every step of the lighting test. You can do as many variations as you'd like, for example you can change the distance from the light to the subject and do exactly the same series of tests you see here. It's totally up to you how extensive you'd like to be. If you notice we didn't fill in the height on this test, as I didn't think it was necessary for this particular light test. If we were testing a beauty dish out however, the height would be a factor.
To learn more about lighting check out the following video tutorials:
Ten Ways To Use One Light Source
How To Work With Complex Lighting Situations
Always dream big...and test your lights.