Open Back Stainless-Steel Letters with LED Halo Lit | Back-Lit Channel Letters

Because this style features an open back, the LED modules are positioned inside the hollow metal cavity facing the rear. If you flush mount these letters directly flat against a wall, the solid metal returns completely trap the light inside, preventing the LEDs from illuminating and potentially causing the modules to overheat. To function correctly, these letters must be offset from the wall using stand-off pins to create a gap that allows the light to escape, bounce off the substrate, and form a beautiful halo ring.

Open back channel letters provide a brighter, sharper, and more intense halo output because the light travels directly from the LED lens onto the wall without passing through a diffusing layer. This creates a high-contrast, dramatic lighting border around the 3D metal shape. It is highly cost-effective and effective for matte, dark, or textured walls that naturally absorb light and require higher lumen intensity.

For fully external structural facade installations, open-back letters rely on a secure seal between the wall-mounted pins and the metal chassis. However, driving rain or shifting humidity can create moisture build-up inside the hollow metal shell. Our outdoor-rated channel letters are engineered with micro-drainage holes at the lowest rear points of the returns. This structural feature allows any captured moisture to drain out freely, keeping the IP67-rated internal LED modules dry, preventing short circuits, and protecting the electrical system.

The optimal offset gap generally ranges from 15mm to 40mm, depending on the overall scale of your signage and the desired look. A smaller gap (around 15mm–20mm) confines the light path, generating a crisp, thin, highly defined border glow around each letter shape. A wider gap (around 30mm–40mm) allows the light to scatter further across the wall substrate, yielding a wider, softer, and more diffused floating aura.

To ensure a precise, guaranteed production quote within 12 working hours, please prepare the following project parameters:

1. A complete vector artwork file (.AI, .EPS, or .PDF layout) with precise overall dimensions and character heights marked.
2. The exact target placement environment (Fully Interior, Semi-Outdoor, or Fully External Exposed).
3. The preferred metal grade and aesthetic finish (e.g., Mirror Polished Silver, Brushed Gold Electroplated, or custom 2pac PMS paint code).
4. Comprehensive wall installation context: substrate material (plasterboard, masonry, concrete, timber), fixing height from the ground, distance to the primary 240V power source, and whether professional installation services are required.
5. Your critical project completion or site handover deadline.