Clamp on lights come in all shapes and sizes and most are useful in your craft fair display. Clamp a light with a long arm near your cash register or at the back of a table and it can shine on product a good arm's length away. It takes little or no space on the table itself but has a lot of impact on your product presentation. Small, short clamp-on lights are useful as well. There may be one spot on a shelf that isn't getting the benefit of your overhead lighting or you may need to highlight a small area. All in all, clamp-on lights are so flexible that they are perfect for booth displays.