This is black seamless paper lighted with a bare-headed M11 light unit firing at a mere 66 watt-seconds,aimed straight at the seamless paper from about 4.5 feet,with the head at the subject's mid-back height.This lighting setup renders the black paper as a blue colored backdrop.The fall-off in light intensity from the bare-M11 head gives a bit of in-camera corner vignetting,which I kind of like. The shadowed side of her face and hair and the shoulder and pearls on the dark side are lighted by a high,downward angled grid spot + diffuser + bardoors on an 11.5 inch reflector placed 7 feet away from the sitter for a very,very small amount of separation light on the hair,shoulder,and the camera-left side of the cheek.The main light is an M11 head fitted with a 48 inch tall Photoflex Lightdome rectangular softbox,also firing at a mere 66 watt-seconds.
This is splitting low-power symmetrical, 200 watt-seconds three ways, for 66 watt-seconds per head and 3-second recycle time on a Speedotron Brown Line D1602 pack,and is the way I learned how to light portraits using what might be called "minimalist amounts" of light from studio flash systems,based on a Dean Collins column published sometime around 1983.