How to choose led module for bolted signs?

Bolted signs - the individual channel letters and sign cabinets mounted to a building facade with bolts or studs - are among the most common illuminated signage on commercial streets. Walk past any shopping mall, restaurant chain, or car dealership at night and you are looking at a bolted sign. What you cannot see is the row of LED modules tucked inside each letter, doing the work of turning that sign into a bright, even beacon.

The module you choose decides how the sign looks on day one and how it still looks five years later. Pick wrong and you get hot spots, dark patches, or letters that need relamping within a year. Here is what to look at when choosing an LED module for bolted signs.

Start with the letter itself: depth, size, and face material

Before comparing modules, measure the sign. A bolted channel letter has a metal or acrylic housing, a translucent acrylic face, and a certain depth. Shallow letters need modules with wide beam angles so light spreads across the face without hot spots. Deeper letters can use narrower optics because light has more room to mix before hitting the face.

Letter size matters too. Large letters need more lumens per module or more modules per letter. Small, tight-stroke letters - like the thin parts of an "M" or "W" - may need mini modules that physically fit inside narrow cavities.

Brightness and efficiency

Brightness is measured in lumens, and efficiency in lumens per watt. For outdoor bolted signs competing with street lighting, you want modules with solid lumen output and high efficiency. High-efficiency modules from a reputable LED module manufacturer deliver more light per watt, which means lower energy bills and less heat inside the letter - heat that can shorten LED life.

Voltage: 12V, 24V, or AC

Most LED modules run on 12V DC or 24V DC. For bolted signs with long runs of letters wired together, 24V is increasingly the standard because it allows longer cable runs with fewer power supplies and less voltage drop. If you are retrofitting an existing sign where adding a DC driver is impractical, high-voltage AC modules (110V-230V) plug directly into mains and skip the transformer.

Waterproof rating

A bolted sign on a building facade is fully exposed to rain, humidity, and temperature swings. Check the ingress protection (IP) rating:

• IP65 - dust-tight, protected against water jets; the baseline for outdoor channel letters
• IP67 - protected against temporary immersion; for heavy-rain regions
• IP68 - protected against continuous immersion; for extreme environments

If the sign faces the weather, do not go below IP65.

Color temperature and consistency

White modules come in warm white (2700K-3000K), neutral, and cool white (6000K-6500K). A luxury boutique might want warm tones; a tech brand usually wants crisp cool white. Whatever you pick, insist on modules from the same bin and batch so every letter matches - nothing looks worse than a sign where one letter glows slightly yellow and another slightly blue.

Beam angle and lens

The lens controls how light spreads. Wide-angle lenses (160 degrees or more) are best for shallow letters where the module sits close to the acrylic face. Black-dot lenses hide the light source when the sign is off, giving a clean, uniform face. For deep sign cabinets, narrower optics push light further before it reaches the face.

Plan the layout and the power

For bolted signs, spacing between modules is as important as the module itself. Too few modules and the face looks patchy; too many and you waste energy and create hot spots. A good supplier provides spacing guidance for each module based on letter depth and face material. Also size the power supply with headroom - running a driver at its maximum rating shortens its life.

Why the supplier matters

The module is only as good as the factory that makes it. A professional LED module supplier should offer:

• Certified quality - an ISO9001 factory, with products carrying CE, RoHS, UL, and PSE marks
• Consistent binning - matched brightness and color across batches
• In-house R&D - custom lumen output, beam angle, PCB size, and wire length
• OEM/ODM - your logo, your spec, your design

HansonLed Ltd is an ISO9001-certified high-tech enterprise in Shenzhen with 13 years of experience in LED signage lighting. Its 2,500 sqm factory runs multiple standard production lines with advanced SMD LED technology, and its products carry CE, RoHS, UL, PSE, and Reach certifications. Customers in more than 80 countries across North America, South America, Europe, and the Middle East buy directly from the factory - which is why HansonLed can offer competitive pricing without cutting corners on quality.

Making the final call

Choosing an LED module for bolted signs comes down to a few numbers: letter depth, lumen output, beam angle, voltage, IP rating, and color temperature. Define those first, then compare modules and request samples. Test a sample in an actual letter before committing to a full order - it is the only way to see how the light really behaves.

HansonLed offers a full range of LED modules for channel letters, light boxes, and sign cabinets in 12V, 24V, and high-voltage configurations, with waterproof ratings from IP65 to IP68 and OEM/ODM support. Contact service@hansonled.com or WhatsApp +86 13798338579 for samples and a quote.