When shooting with two photographic lights, how to set the position of the light box so as not to appear ghosting?

If you shoot a character: two lights hit in one direction, one in front of the other, one high and one low. In front, the main light hits from a height, imitating the sun; Secondly, the auxiliary lamp, the height of which is similar to the height of the subject (specifically, the photometric adjustment during shooting), supplements the smile groove to make up the light and eyes.

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