My entry for the portrait contest this week. The white light behind the subject is actually that! It is not a white background lit with strobes. It is a large softbox 12 inches directly behind the subject. Genuine back lighting at its core. It also gives a nice soft quality light that highlights the cheeks and bathes the subject in beautiful light on her skin.
Camera Nikon: D750
Iso: 200
Speed: 1/160
Aperture: f8
Focal Length: 82mm
Nikon 70-200 f4