'Grip Tips' Videos Are a Great, Free Resource for Learning Tools to Light a Film Set
If you're a fan of the informational videos put out by folks like The Slanted Lens, Film Riot, and theC47, then you'll also want to check this one out. Grip Tips focuses on tools of the trade for grips and electricians working on a film set, but the equipment that's explained could also be found in a photography studio as well.