LED Module Spec Sheet Decoder: What Signage Buyers Should Verify Before Ordering
Sun 19,2026
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The numbers on the page are only useful if you know which ones answer your project's real questions.
Two procurement managers receive the same LED module data sheet. One sees a list of numbers and trusts the brand logo at the top. The other sees a set of questions: Will this run hot in a sealed channel letter? Will the face look bright at the edges or dim in the corners? Will the shipment pass customs in the destination country?
Six months later, the first manager is explaining backlight inconsistency to an unhappy client. The second is ordering repeat stock. The difference was not the price. It was knowing how to read the spec sheet before placing the order.
What an LED Module Spec Sheet Actually Describes
An LED module is a self-contained lighting unit: LEDs mounted on a circuit board, wired for power, and often housed or lensed for a specific application. For signage, modules are the workhorses behind channel letters, light boxes, sign cabinets, and logo faces. Unlike continuous LED strips, modules are discrete units that can be spaced, angled, and replaced individually.
A spec sheet translates that physical product into numbers. The trick is knowing which numbers matter for your sign type, environment, and market.
Voltage: 12V, 24V, or Line Voltage?
Voltage is usually the first line on the sheet, and it is not a detail you can ignore. Most signage modules run on 12V DC or 24V DC. The choice affects current draw, voltage drop, power supply cost, and installation safety.
12V modules are common for small channel letters and short runs. They are easy to source and pair with compact power supplies. 24V modules draw half the current for the same wattage, which reduces voltage drop over longer runs and allows fewer power feeds on large signs. Some high-voltage modules operate at 110V or 220V AC for very large installations, but they require different safety considerations.
The rule is simple: match the module voltage to the power supply, the run length, and local electrical codes. A mismatch is not a compatibility issue; it is a warranty and safety issue.
IP Rating: Where Will the Module Live?
The ingress protection rating tells you how well the module resists dust and water. For signage, this is often the difference between a sign that lasts and one that fails after the first heavy rain.
| IP Rating | What It Means | Typical Signage Use |
|---|---|---|
| IP20 | Dust-protected, no water resistance | Indoor signs, enclosed cabinets |
| IP65 | Dust-tight, protected against water jets | Outdoor signs under canopies |
| IP67 | Dust-tight, protected against temporary immersion | Outdoor channel letters, exposed logos |
| IP68 | Dust-tight, protected against continuous immersion | Harsh marine or flood-prone environments |
If your project faces rain, humidity, or cleaning crews with pressure washers, IP65 is the minimum for outdoor work. For fully exposed coastal or industrial signs, IP67 or IP68 is the safer bet.
Beam Angle and Sign Depth
Beam angle determines how widely the light spreads from each module. A narrow angle focuses light straight ahead; a wide angle floods the cavity. The right choice depends on the depth of the sign.
Shallow channel letters and thin light boxes need wide beam angles, typically 160° to 170°, to avoid bright hotspots in the center and dark edges. Deeper cabinets can use narrower angles because the light has more room to mix before hitting the face. The wrong angle is one of the most common reasons a sign looks uneven.
A good channel letter LED module supplier will ask for your sign depth before recommending a lens angle. If they do not ask, that is a signal to dig deeper.
Power, Lumens, and Color Temperature
Wattage tells you how much energy the module consumes; lumens tell you how much light it produces. The ratio between them, lumens per watt, measures efficiency. For signage, efficiency matters because it determines how many modules and power supplies you need and how much heat you must manage.
Color temperature, measured in Kelvin, affects the mood and readability of the sign:
- 2700K–3000K: Warm white, suitable for hospitality and retail warmth.
- 4000K–5000K: Neutral to cool white, common for commercial and office signage.
- 6000K–6500K: Daylight cool white, high visibility for outdoor signs.
Some projects need RGB or RGBW modules for color-changing effects. Others need CCT tunable modules that let the client shift between warm and cool white. Make sure the spec sheet matches the design intent, not just the catalog default.
Max Series Length and Voltage Drop
Every spec sheet lists a maximum number of modules per power feed. This limit exists because voltage drops along a long chain of LEDs, causing the modules at the end to look dimmer than those at the start. Running too many modules on one feed also strains the power supply and raises the risk of failure.
If your layout exceeds the recommended series length, split the load into parallel runs. The extra wiring takes more time during installation, but it prevents the slow dimming that ruins a sign's appearance.
Certifications: The Market Passport
Certifications are not decoration. They are proof that the product has been tested against the safety and environmental standards of a specific market. Before you order, confirm which certifications your destination country requires and whether the spec sheet lists them accurately.
Common certifications for signage LED modules include CE for Europe, RoHS for restricted hazardous substances, UL for North America, PSE for Japan, and Reach for chemical compliance in the EU. A reputable led module manufacturer will provide certificates with scope statements that match the exact product you are buying, not just a generic company certificate.
Five Questions That Separate Manufacturers from Resellers
A spec sheet is a promise. A factory is what keeps it. Before committing to a supplier, ask these five questions:
Suppliers who answer with documents and data usually control their own process. Suppliers who answer only with adjectives often rely on someone else's factory.
Why Buyers Source LED Modules from HansonLed
HansonLed Ltd, founded in 2013, operates a 2,500 sqm factory in Shenzhen's LED industrial belt. As a led module supplier serving customers in more than 80 countries, the company produces LED modules, LED strips, LED rigid bars, and LED neon flex for signage and commercial lighting.
The product range covers the needs described in this guide: mini modules for compact channel letters, high-efficiency modules for light boxes, IP67 and IP68 modules for outdoor exposure, RGB and pixel modules for dynamic effects, and high-voltage options for large installations. Certifications include ISO9001, CE, RoHS, PSE, UL, and Reach. OEM and ODM services are available for custom size, logo, and color requirements.
With 13 years of production experience, an in-house R&D team, and 24-hour online customer service, HansonLed supports buyers who need more than a catalog. They need a partner who can read the same spec sheet and explain what it means for their project.
Quick Decision Checklist
Still translating spec sheets into project risk? Browse the HansonLed LED module catalog or contact the team with your sign dimensions and target market. A reliable supplier answers before you place the order, not after the first service call.
