This element of design is Negative Space. The hand isn't actually holding anything. It implies that there is a light bulb in the empty space. Negative space guides your imagination to finish the image.
Fashion Shoot: Septime Webre’s Alice in Wonderland, Washington Ballet. Creative & Art Direction by Jake Lefebure and Pum Lefebure of Design Army. Photography by Dean Alexander. //I really really like the minimal use of overlaying graphics in these images.