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lighting advice for high power HMI and theory of three phase electricity


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I’m prepare doing lighting for a indie film, somehow I’m still a beginner in lighting, I used to do lighting with small power light, so I used to drag the household power,.Since I prepare to light a large scene , maybe need to rent some large power HMI (4K or more) which the household power cannot afford, so what options can I have ?



I’ve thought of generator, but I’m not sure if the power is steady to operate high power light, also the noise issue.



I’ve heard of three phase electricity which most of lighting make use of, but I am not sure the theory and how to calculate the power, is there any advice on that ? Also normally where I can get the three phase electricity?



Thanks


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