Prelit

Prelit refers to a product, device, or installation that has a built‑in light source activated prior to use, typically requiring no additional wiring or external power supply beyond a single connection point. The term is most commonly applied to signage, lighting fixtures, clothing, and stage equipment. In the context of commercial signage, prelit displays are permanently illuminated by a small cold‑tube or LED module incorporated into the back of the sign panel. These units offer low maintenance, quick installation, and instant visibility, making them popular for retail storefronts, wayfinding, and advertising.

In fashion and apparel, prelit garments incorporate small fiber‑optic or LED strips to create luminous patterns. These items are often used for safety, such as reflective workwear, or for aesthetic purposes at nightlife events. Stage and event lighting companies employ prelit fixtures when rapid setup is essential; the fixtures contain the lamp and ballast in a compact housing, allowing them to be powered directly by a conventional dimmer.

The history of prelit technology tracks the evolution of low‑power, efficient lighting such as fluorescent tubes and later LED technology, which allowed for smaller, longer‑lifespan light sources. Modern prelit products emphasize energy efficiency, durability, and compliance with safety standards. Because the light source is integrated, prelit devices can be used in environments where external wiring is impractical or prohibited, such as temporary outdoor installations, interior projections, or mobile platforms.