I would consider it a photograph by Mili because I assume that the idea of Picasso painting with light was his idea. While Picasso did the drawing, it would not have been possible without Mili.
But either way, it's a great idea for a portrait. I don't know the date of the image but probably late 50s early 60s. The idea of using light in such a way in an image was probably new and quite fascinating to the non-photographers who saw the mage.