In the field of modern commercial display and advertising, light boxes have become the first choice for many businesses due to their bright and long-lasting lighting effects. So, how exactly do light boxes achieve stable illumination for extended periods? Let’s take 3 minutes to explore the secrets behind their light source and circuit design.

Light boxes typically use LEDs as their light source, which is one of the key factors enabling their continuous glow. For instance, many light boxes adopt brand-specific light sources designed for industrial use, such as chips from San’an or Osram. Under normal usage conditions, these high-quality chips have a designed lifespan of over 50,000 hours. This means that if used for 10 hours a day, the light strip can last for up to 10 years; even if kept on 24 hours a day, the service life can still exceed 5 years.

LED light sources are characterized by high efficiency, energy savings, and long lifespans. Compared to traditional neon tubes or fluorescent tubes, their service life is extended by 3 to 5 times, significantly reducing replacement frequency and maintenance costs. Additionally, LED light sources boast extremely high energy conversion efficiency—technically, they consume only 10% of the energy of incandescent bulbs and 50% less energy than fluorescent lamps.

Beyond high-quality light sources, the circuit design of light boxes also plays a crucial role in maintaining their continuous glow. Light boxes generally use low-voltage constant-current power supplies, either 12V or 24V. These low-voltage power supplies can adapt to situations with unstable current or voltage, allowing the light source to perform more effectively and stably.

In terms of circuit connection, the LED beads inside a light box typically use a combination of series and parallel connections. The LED beads within a single character or pattern are connected in series, while individual characters or patterns are usually connected in parallel. This connection method ensures that if one LED bead malfunctions, it will not affect the normal operation of other beads. Meanwhile, an appropriately rated current-limiting resistor is connected in series in the circuit to control the current passing through the LED beads, ensuring they operate within their rated current range and preventing damage from excessive current.

Furthermore, the power supply of some light boxes is installed outside the back panel of the light box. This design effectively dissipates heat from the power supply, enhancing its stability and service life. If the power transformer fails, maintenance is also straightforward—only the faulty power supply needs to be replaced individually.

In summary, through the adoption of high-quality LED light sources and sophisticated circuit design, light boxes achieve stable, long-lasting illumination, providing reliable lighting support for commercial displays and advertising campaigns.