How Do Exit Signs Work On Both Sides

How Do Double-Sided Exit Signs Work? Illuminating the Path to Safety

Finding your way out during an emergency is critical. That's why exit signs are essential, and double-sided exit signs maximize visibility and safety. But how do they manage to illuminate from both sides? Let's delve into the inner workings of these crucial safety devices.

The Technology Behind Double-Sided Illumination

The magic lies in the clever design and use of light sources and reflectors. There are primarily two types of double-sided exit signs:

1. LED Backlit Signs: The Modern Standard

These signs utilize high-efficiency LEDs arranged strategically along the edges of the sign. Instead of a single light source in the center, multiple LEDs shine outwards, illuminating both sides of a translucent panel. The panel itself is usually made of acrylic or polycarbonate, materials chosen for their durability, light diffusion, and even illumination.

• How the light spreads: The diffused light from the LEDs evenly illuminates the panel, creating a bright and easily visible exit sign from both sides.
• Energy Efficiency: LEDs consume significantly less energy than older technologies, making them a cost-effective and environmentally friendly choice.
• Longer Lifespan: LEDs have an incredibly long lifespan, reducing the frequency of replacements and maintenance.

2. Electroluminescent (EL) Exit Signs: A Less Common Approach

While less prevalent than LED signs, electroluminescent exit signs offer a slim profile and even illumination. They use a thin layer of electroluminescent material sandwiched between two conductive layers. Applying voltage makes the material glow, providing a soft, even illumination on both faces.

• Uniform Illumination: EL signs tend to have very uniform illumination across their surface.
• Low Heat Generation: They generate very little heat during operation.
• Lower Brightness: Generally, EL signs are less bright than LED options, but this may not be a significant factor depending on the application.

Key Components Contributing to Double-Sided Functionality

Regardless of the light source (LED or EL), several components contribute to the functionality of double-sided exit signs:

• Translucent Panel: This panel allows light to pass through, creating a visible sign from both sides.
• Light Guide: In some LED signs, a light guide is used to channel the light efficiently from the LEDs to the edges of the panel for maximum illumination.
• Reflective Material: While less common in modern designs, reflective materials behind the panel can enhance brightness and visibility from both sides.

Choosing the Right Double-Sided Exit Sign

The choice between LED and EL double-sided exit signs depends on several factors, including budget, brightness requirements, and aesthetic preferences. LED signs are generally preferred due to their higher brightness, longer lifespan, and energy efficiency.

Maintaining Your Double-Sided Exit Signs

Regular maintenance is crucial to ensure the continued effectiveness of your exit signs. This includes:

• Regular Inspections: Check for any damage to the signs, including cracks, broken LEDs, or dimming light.
• Cleaning: Clean the signs regularly to remove dust and debris, ensuring maximum light output.
• Testing: Regularly test the signs to ensure they are functioning correctly.

Properly functioning double-sided exit signs are vital for safety. By understanding their technology and maintaining them correctly, you can significantly enhance safety and ensure clear evacuation routes in any building or facility.