categg already explained the lighting position, 3 lights used, 1 from rear left with blue filter, 1 from rear left with green filter blast on the backdrop, one key light from right. And this time he had the subject look towards the main light so that only little side of the face falls into the shadows.

It's simple to reverse engineer lighting, just look at where the shadows and illuminations are. If it was me, I'd use a snoot on the light with green filter, just personal preference