The term light box also refers to a lighted display panel used for advertising purposes by a variety of businesses, especially the retailers. The panel can be illuminated by fluorescent light bulbs or LED lighting strips. The efficiency of light boxes improved dramatically after the introduction of LED technology. These lighting sources can be placed at the back of the panel, or even at the side of it.
A light box is very simple to use. You just need to insert whatever graphic you'd like to display into the light box itself and the image can be changed anytime you want. Some light boxes are designed especially for outdoor purposes so they are more weather and water proof and usually have a lock on their front end to secure the images inside. One can see such light boxes easily in any retail shop or in a movie theatre.