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What is a lightbox sign?

The term ‘lightbox’ came into common use about the middle of the 20th century, as lighted cabinets that hold and display a sheet of backlit graphic film began to appear in commercial and retail environments.

A lightbox sign traditionally, is an electrically-lit sign that contains the mechanisms to encapsulate, suspend, protect and display a discrete sheet of backlit film which embodies a print image, and which is designed to transmit light through the film for increased image brightness, contrast and colour saturation.

Lightbox sign vs electric sign

You might be wondering if a lightbox sign is the same as an electric sign. The term ‘electric sign’ traditionally began to be used to refer to roadside commercial signs powered by filament-electric lamps. Now, while technically speaking, any product that can be categorised as a ‘sign’ and powered by ‘electricity’ would be classified as an electric sign, the term lightbox sign is typically differentiated from electric signs in the sign industry.

The reason for this differentiation in practice is simply a matter of convenience: Lightboxes have so many attributes that distinguish them from other electric signs.

What distinguishes a lightbox from other electric signs?

Here’s a list of the main differences:

1. Graphic Updating — Lightboxes are usually designed for frequent replacement of the graphic (such as a monthly or seasonal promotional message), so they provide a quick method for opening and accessing the graphic without tools. Conversely, (non-lightbox) electric signs are usually designed for a long-term or permanent display of a graphic (such as the name of a store), so they don’t need such easy access to the graphic.
2. Material — Lightboxes are usually built of extruded aluminium, whereas electric signs are often constructed of steel, wood or plastic. Aluminium is generally considered to be more ‘upscale’ in both rigidity and elegance, but other materials are often more economical for larger electric signs. Electric signs are often much larger than lightboxes and used for building and highway signage that’s intended for viewing from greater distances.
3. Graphic Security — Lightboxes usually sandwich the backlit film loosely (without glue) between two lenses so that it can be removed without wasting a lens, when the image needs to be updated. This is achieved via some combination of flip edges, slide frames, snap frames and/or hinged doors. Electric signs usually contain only one translucent lens layer, for the sake of simplicity, longevity, and also to decrease the need to manage moisture condensation. Most electric signs do not use a backlit film for their artwork.
4. Viewing distance — Lightboxes are more often intended for close-up viewing than electric signs; hence the basis for improved elegance.
5. Simplicity — Lightboxes are almost always rectangular and generic in terms of any artwork or message or branding. This enables mass production and puts downward pressure on unit cost. All the ‘customisation’ of a particular lightbox application is fully executed at the graphic film level, by simply replacing one printed film with another. Electric signs are often custom-shaped, die-cut and/or fitted with custom-designed features that aid in the communication of the particular message or brand, such as a sign frame shaped to the letters that spell out the name of a store.