The studio of the painting conservator has very little ambient light, therefore most of the light in the image is flashlight.
The main light is a 60 x 100 cm Softbox positioned in front, slightly on the right side of the model. As it is on a higher level than the face, you can see some soft shadow under the nose.
On the left side, from the back, a 30 x 120 Softbox is used. Both Softboxes are in a vertical position.