I come from a photographic background.
I find myself now setting up lights for BOTH photo and video.
What I find is this:
Video eats light.
more (light) is better.
 I start by setting up my ambient (lowest level where I need detial in the shadows) first. Then build my lighting up from there.
I've used dimmers. they make audible noise off the lights and change the color, making them difficult. Better results starting with a lightsource that meets the minimum level your camera can record without pumping up the sensor gain.
then add lights with more power to build up your light ratios.
easier to move a light back, or scrim it with black screen material or a grid to reduce its brightness, or add difussion.Â
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