How to read an LED cabinet datasheet honestly

LED cabinet datasheets are written by marketing departments and reviewed by engineering. The order of operations matters: by the time engineering sees the document, the front page has already been laid out to flatter the headline numbers. The honest specification is in the engineering specification block on page two or three — and in the rows that have been left out.

This is the field-tested reading order, plus the rows that must be present.

Step 1: Skip the front page

The hero section of every LED datasheet shows the same three numbers: brightness, pixel pitch, refresh rate. All three are real specifications. None of them is where suppliers compete dishonestly.

• Brightness. Quoted in nits at maximum drive. Almost always honest because it is trivially measurable on site with a luminance meter. The legitimate question is what calibrated working brightness looks like (typically 60–80% of maximum for service-life reasons), not whether the headline figure is real.
• Pixel pitch. Geometrically defined, trivially measurable. The legitimate question is whether the chosen pitch suits your viewing distance, not whether the figure is honest.
• Refresh rate. Honest as a number. Nearly meaningless without scan ratio. See scan rate decoded for the long version.

If the front page is all you see, you do not have a datasheet — you have a brochure. Ask for the engineering specification.

Step 2: Verify the four hidden rows

The engineering specification block must contain these four rows. If any are absent, the procurement question is “what is the answer” — not “is it good enough.”

2a. Driver IC family, by name

Acceptable: “MBI5153”, “ICN2153”, “MBI5252”, “FM6353”.

Unacceptable: “high-refresh driver IC”, “premium-grade driver”, “Macroblock-class driver”.

The driver IC governs scan ratio, bit depth, PWM type and refresh stability. Without the name, you cannot verify any of those. The full driver IC reference is at /resources/performance-benchmarks.

2b. Scan ratio at full image data

Acceptable: “1/16 scan”, “1/32 scan”, “1/64 scan”.

Unacceptable: “high scan ratio”, “broadcast-grade scan”, “low scan visible flicker eliminated”.

Watch for “scan ratio at reduced grayscale” — some datasheets quote a 1/32 figure that only applies when the cabinet is running at less than 8-bit grayscale, with a 1/16 fallback at full bit depth. Ask explicitly: “What is the scan ratio at full hardware bit depth, full brightness?” The answer should be one number.

2c. Hardware grayscale bit depth

Acceptable: “16-bit hardware”, “14-bit hardware”, “16-bit per channel”.

Unacceptable: “14-bit + dithering equivalent to 16-bit”, “16-bit effective”, “high bit depth”.

The dithering footnote is fine if you also have the hardware figure. Without the hardware figure, you do not know what the cabinet will look like in slow-motion broadcast or fine-pitch close-viewing.

2d. Diode brand, SKU and bin grade

Acceptable: “Nationstar NS3535 A-bin”, “Kinglight KG2727 A+”, “Cree CR3535 A+”.

Unacceptable: “Nationstar-class diode”, “premium grade A LED”, “high-bin LED chips”.

Bin grade is the manufacturer’s own quality grading of dies that came off the same wafer. A-bin and A+ have tighter wavelength and brightness tolerances. B-bin (and unstated) is a bigger spread, which presents on the wall as visible cabinet-edge colour seams and accelerated brightness depreciation.

Step 3: Verify the four supporting rows

These four matter for service life and outdoor reliability.

3a. PCB stack-up

The minimum line: layer count (4 or 6), copper weight (1 oz or 2 oz), surface finish (HASL, OSP or ENIG), impedance control (yes / no, and if yes, target ohms).

See PCB stack-up secrets for the long version.

3b. IP rating, separately for front and back

Outdoor cabinets need to be specified front and back independently, because the failure modes differ. Front IP65 minimum is required for any rain-exposed install. Back IP54 is the minimum if the cabinet is mounted in a controlled-access cavity; back IP65 is required if the back is exposed to wind-driven rain or wash-down cleaning.

A single “IP65 rated” figure without front/back separation usually means front IP65 / back IP54. Ask explicitly.

3c. Operating temperature range

Australian outdoor installs must operate from −5°C (Tasmania, alpine NSW) to +50°C (cabinet skin temperature in summer sun on a north-facing facade). Anything quoted as “operating range 0°C to 40°C” is an indoor cabinet sold for outdoor use. Reject.

3d. Warranty: parts vs on-site

Three-year parts is industry baseline. The spec to interrogate is what happens on-site:

• Parts-only warranty. You pay for the technician, the lift, and the on-site labour to swap the failed module. For a stadium centre-hung at 30 m above the playing surface, the on-site labour cost can exceed the cost of the cabinet.
• Parts + on-site labour warranty. The supplier’s technician swaps the module at no cost to you, but you still book the lift.
• Full on-site warranty. The supplier handles parts, labour and access equipment for the full term.

For tendered stadium and large-format outdoor installs, anything less than parts + on-site labour for the full warranty term is a red flag.

Step 4: Verify against an LED Analyser report

The single best signal that a supplier is honest about their datasheet is whether they will provide a third-party or in-house LED Analyser report against the cabinet you are quoting against.

An LED Analyser is the industry-standard MLED test system that automates measurement of brightness uniformity, contrast, gamma, PQ EOTF, colour gamut and refresh fidelity at the per-pixel level. The report is the empirical proof of every datasheet number.

Aurora’s LED Analyser is in-house and a standard part of the 12-section factory acceptance protocol. The report is available on request for any tendered project.

The procurement checklist

The eight rows that must be present on every quotation:

1. Driver IC, by part number.
2. Scan ratio at full hardware bit depth, full brightness.
3. Hardware grayscale bit depth (separately from any dithering claim).
4. Diode brand, SKU and bin grade.
5. PCB layer count, copper weight, surface finish, impedance control.
6. IP rating, separately for front and back.
7. Operating temperature range.
8. Warranty terms: parts vs on-site labour vs full.

If your tender response is missing any of these rows, return it for clarification before evaluating on price. The total cost of the resulting service ticket exposure is greater than the cost differential between cabinets.

Aurora publishes all eight

Every Aurora datasheet ships these eight rows. The reference matrix that shows what’s in each Aurora range — LUX, V-SPEC and GSR — against the same eight columns we use to evaluate every competitor cabinet, lives at /resources/performance-benchmarks.

Talk to us and bring the competing quotation. We’ll show you which rows are missing — and what the answer is for each Aurora range.