Yeah, we can obviously see that you mastered lights pretty well. Still (though I know that this probably wasn't your goal, I feel compeled to critique on it), those two figures in the background deviate the atention from the model.

Besides this, I feel really uneasy with that metalic box on the left corner. That and, probably, the distortion on that sace corner provoked by the wide lens that you used.

Something else that you should've payed more atention would be the light on the top of the imagem. Yet it's true that we don't know what's not shown on the picture, I imagine that the photo could've gained a lot iv you could've moved further (if possible) away from the model so that you'd capture that.

As you see, my critique was essentially on the composition and not so much on the light. Since this photo was part of a light master class, I thought it would be better to call your atention to the details that prevent this image to be a 100% perfect image.

Hope to have helped you somehow