If a window is within the reach of a light stand or a condor, you can blast light through it, whether it be natural light or hard or soft light that you create.
Lighting car interiors at night. How I light, what choices I make with specific units, and why one lighting tool is selected over another.
How to read a color temp meter and why it is important. I have always loved understanding the color of different lights — street lights, fluorescents in a store, neon, moonlight, etc.
The light meter is essential for matching and to get your head around light ratios as a young cinematographer.