This is a portrait lighting setup by Swedish photographer Frida Lenholm using only a window as a single light source. Since there is no expensive equipment needed, this is a lighting setup that anyone can test.
Frida: – I am very weak for portraits that are illuminated with window lights. For this portrait lighting with Börje Salming there was only one window in a dark room which created a nice contrast between light and dark.
The closer to the window you put the model, the faster the light will fall off, and give a stronger contrast. For more details regarding this, you can study the inverse-square law.
By placing Börje at an optimal distance from the window, I found a balance of contrast and even exposure that captures Börjes personality.