You would greatly benefit


You would greatly benefit from a few tutorials on lighting. The question you're asking is not nearly as important as other factors involved in aesthetically nice lighting. Most cameras require a minimum illumination level. After you've got the minimum, the rest is about creating a look and feel. For that, it's all about quality, color and placement of light(s).  To use a cooking analogy: if a little salt is good, a lot is not 'better'.


So long as your camera is not starving for photons, you'll be okay with adding more light…but it always comes at a cost (which might be spill, aperature, heat, energy, shadows, etc.)


The story changes if you're trying to balance exposure with existing lights (practicals, as they are called in tv production).

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