| Average Operating Power | Indoor displays: approximately 180–350 W/m² at normal operating conditions; outdoor displays: approximately 200–450 W/m², depending on brightness and pixel pitch. | Average power is more useful than maximum power for estimating annual electricity consumption. | Request a test report showing screen size, pixel pitch, brightness, content pattern, operating time, voltage, and measured power in watts per square metre. | 25% |
| Maximum Power Consumption | The maximum value should be clearly stated separately from average operating power and supported by a cabinet-level electrical specification. | Maximum power determines cable sizing, power distribution, circuit protection, and cooling requirements. | Check the product datasheet, power-supply rating, cabinet input current, and a full-white test performed at the specified maximum brightness. | 10% |
| Brightness Control | At least 0–100% brightness adjustment, with automatic or scheduled control available for changing ambient-light conditions. | Reducing brightness when full output is unnecessary can significantly reduce energy use and extend LED operating life. | Test manual adjustment, automatic brightness sensors, scheduling functions, and brightness stability at low levels. | 12% |
| Power-Supply Efficiency | Use high-efficiency switching power supplies with published efficiency and input-voltage data; the exact value should be confirmed under the intended load. | Higher power-supply efficiency reduces electrical losses and heat generated inside the cabinet. | Request third-party or laboratory test results covering light, typical, and heavy-load conditions rather than relying only on a marketing claim. | 10% |
| Energy-Saving Driving System | The product should support calibrated current control, adaptive brightness, low-power standby, and stable grayscale performance. | Accurate current control prevents unnecessary LED over-driving while maintaining image quality. | Compare current settings, grayscale uniformity, brightness consistency, and power readings at the same image output. | 10% |
| Pixel Pitch and Application Matching | Select the largest pixel pitch that meets the required viewing distance and image-detail requirements. | Fewer LEDs per square metre generally reduce the power required for a display of the same physical size. | Calculate viewing distance, image resolution, cabinet area, LED quantity, and measured power before comparing quotations. | 8% |
| Thermal Management | The design should provide adequate ventilation or heat dissipation, temperature monitoring, and stable operation without excessive fan use. | Lower operating temperature can improve reliability and reduce energy losses caused by thermal stress and inefficient cooling. | Review thermal test results, cabinet temperature measurements, fan specifications, and operation at the highest rated ambient temperature. | 8% |
| Brightness and Color Uniformity | The manufacturer should provide a documented uniformity measurement method and acceptance tolerance for brightness and chromaticity. | Uniform displays are less likely to require excessive brightness settings to compensate for visibly darker areas. | Use a calibrated luminance meter or request a factory acceptance report covering multiple modules and cabinet positions. | 5% |
| Operating Lifetime and Reliability | A rated LED lifetime of around 100,000 hours is commonly stated for professional products, but actual life depends on current, temperature, brightness, and duty cycle. | Longer service life reduces replacement materials, maintenance visits, production downtime, and total ownership cost. | Check the warranty terms, failure-rate policy, burn-in procedure, environmental testing, and conditions attached to the lifetime claim. | 7% |
| Environmental Protection | Outdoor products should normally be evaluated for an appropriate IP rating, such as IP65 for the front of a suitably enclosed display; the exact rating depends on the design. | Proper protection prevents moisture and dust damage that can increase power consumption, repairs, and premature replacement. | Request the applicable ingress-protection test report and confirm that the tested cabinet construction matches the supplied product. | 3% |
| Measurement Transparency | The supplier should disclose test conditions, instruments, calibration status, ambient temperature, brightness, content pattern, and sample configuration. | Transparent measurement conditions make energy claims comparable between different manufacturers. | Reject comparisons based only on unsupported percentages such as “30% lower consumption” without a defined baseline and test protocol. | 2% |