Light Boxes share a lot of their features with pop-ups. They could be referred to as opt-in forms that take on the appearance of an overlay on top of a webpage. Although quite similar, one striking difference that the light box may have from a pop up is that light boxes will often have the overlapped screen blurred out in order to concentrate the user’s attention on the box itself. Pop-ups,on the other hand, have no such feature and thus the user can see the page behind the overlay quite clearly.