Light meters are an important part of lighting and how cameras record both contrast and highlights in your video productions. Unfortunately, due to the current wave of "automatic everything" cameras, shooters are becoming less educated on how to control contrast and how to shoot consistently great imagery. Regardless of what type of camera and lighting you are using, a more thorough understanding of light and contrast will only help you to "see the light" more clearly. If you can shoot your scenes properly, you'll spend a lot less time in post fixing your mistakes on set.
I've been using a Sekonic incident/spot meter for many years, and I recently got the new Sekonic C-700 color temperature meter. Both tools provide invaluable information for a cinematographer ... If you understand how to use a meter properly. When shooting coverage in a scene, especially when you might be shooting out of sequence, or lighting a set for actors moving within the set, a light meter is really the only way to ensure consistency throughout your scenes and sets.
So ... I am posting an article I wrote many years ago that I believe still offers a simple explanation of how to use a light meter. The only thing that has really changed in recent years is the much expanded latitude of today's cameras. What used to be a 5-6 stop latitude on a video production camera is now 10-15 stops. You can adjust accordingly for your current camera.
Enjoy the read .. I hope this helps you to take a big step towards creating better images! And no comments on the headshot of me please :) BH