This is a stereoscopic view.  To view the images in 3-D, slightly cross your eyes until a composite image forms in the middle.  When this happens, attempt to position the composite photo over one of the two original lamp photos.  When you've achieved the overlap the images combined should form a 3-D photo.  For a small percentage of people (5 -10%) this affect won't work.  It may take a little persistence for others.