| Luminous Efficacy | 100–160 lm/W for general commercial products; higher values may be available in optimized designs. | Higher efficacy produces more light with less electricity and reduces operating costs. | Check tested lumens and input watts in an accredited photometric report. Do not rely only on marketing claims. |
| Power Consumption | Typical LED corn bulbs range from approximately 10 W to 100 W, depending on the required light output. | Correct wattage selection prevents over-lighting, excess heat, and unnecessary energy use. | Compare measured input power, rated voltage, frequency, and lumen output under the same test conditions. |
| Equivalent Replacement | A 30–40 W LED product may commonly replace a 100–150 W metal-halide or high-pressure sodium lamp, subject to fixture and lighting requirements. | Equivalence depends on delivered lumens, optics, mounting height, and the original lamp type. | Use a lighting calculation or compare photometric files rather than relying on wattage equivalence alone. |
| Rated Life | 50,000 hours is a common target for quality commercial LED lamps; actual life depends strongly on temperature and driver reliability. | Longer life reduces relamping labor, access equipment costs, and maintenance interruptions. | Request LM-80 data for LED packages and TM-21 projections where applicable, plus a declared L70 value and warranty terms. |
| Lumen Maintenance | L70 ≥ 50,000 hours is a practical commercial benchmark, meaning at least 70% of initial lumens are expected at the stated period. | Rated life does not necessarily mean the lamp stops working; lumen depreciation is often the more useful measure. | Confirm the L70 rating, ambient-temperature assumptions, case-temperature limits, and test methodology. |
| Power Factor | ≥0.90 is a strong target for commercial installations; local regulations or utility requirements may differ. | A higher power factor reduces reactive current and may improve electrical-system utilization. | Review electrical test reports at the rated voltage and frequency, including performance at different input voltages. |
| Total Harmonic Distortion | THD ≤20% is commonly preferred for commercial projects; lower values are beneficial for sensitive electrical systems. | Lower harmonic distortion can reduce waveform distortion and interference with other equipment. | Request a driver test report showing THD at the intended supply voltage and load condition. |
| Color Rendering Index | CRI ≥80 for warehouses, roads, and general areas; CRI ≥90 for retail, hospitality, and visual-quality applications. | Higher color rendering provides more natural and accurate appearance of objects. | Check the LM-79 or equivalent photometric report and confirm the stated CCT and CRI. |
| Color Temperature | 2,700–3,500 K: warm light; 4,000–5,000 K: neutral to cool light; 5,000–6,500 K: daylight appearance. | CCT affects visual comfort, perceived brightness, atmosphere, and suitability for different environments. | Specify nominal CCT, chromaticity tolerance, and consistency requirements before ordering. |
| Beam Distribution | Select the distribution according to the fixture and application; many corn bulbs provide approximately 270°–360° coverage. | A wide distribution can improve use in open fixtures, while directional optics may be more efficient in specific layouts. | Review the IES or LDT photometric file and verify the physical orientation of the lamp in the fixture. |
| Thermal Management | Use aluminum heat sinks, adequate ventilation, and a stated operating-temperature range suitable for the installation. | Excessive heat accelerates LED lumen depreciation and can shorten driver and capacitor life. | Confirm maximum ambient temperature, case-temperature data, fixture compatibility, and whether enclosed fixtures are permitted. |
| Ingress Protection | IP20 or similar may suit dry indoor locations; IP54 or higher is generally more appropriate for dusty or damp environments, subject to the complete fixture. | The rating indicates resistance to solids and water, but it does not replace correct fixture installation. | Verify the exact IP rating, test standard, and whether the rating applies to the lamp alone or the complete luminaire. |
| Electrical Safety | Check insulation, dielectric strength, touch-current limits, grounding, surge protection, and compatibility with the intended socket. | Proper electrical protection reduces shock, fire, premature failure, and electromagnetic-interference risks. | Request safety test reports, wiring diagrams, installation instructions, and evidence of protection against voltage surges. |
| Socket and Voltage Compatibility | Confirm the base type, such as E26/E27 or E39/E40, and the exact supply range, such as 120 V, 230 V, or 100–277 V AC. | Incorrect base dimensions or voltage can cause unsafe operation, flicker, overheating, or non-compatibility. | Match the product label and datasheet to local electrical conditions and inspect the socket, ballast, and fixture wiring. |
| Dimming and Controls | Only select dimmable versions when the dimmer type and control protocol are explicitly supported. | Incompatible dimmers may cause flicker, noise, limited dimming range, or driver damage. | Request a compatibility list and test the lamp with the specific dimmer, sensor, or control system. |
| EU Market Requirements | Common documentation includes CE conformity, applicable electrical-safety and EMC compliance, RoHS, and applicable ecodesign or energy-label obligations. | These requirements support market access and address safety, electromagnetic compatibility, hazardous substances, and energy performance. | Request the EU Declaration of Conformity, technical documentation, test reports, and product labeling before import. |
| United Kingdom Requirements | Products placed on the Great Britain market may require UKCA requirements; Northern Ireland may follow different arrangements for certain products. | Market-specific conformity procedures and labeling help demonstrate compliance with local rules. | Confirm the current requirements with the importer or competent compliance professional and retain the technical file. |
| North American Requirements | Safety certification to applicable national standards is commonly requested; FCC requirements may apply to unintended radiators and digital electronics. | Compliance supports electrical safety, electromagnetic compatibility, retailer acceptance, and installation approval. | Verify the applicable certification mark, report number, voltage configuration, and local authority or retailer requirements. |
| Warranty and Quality Control | A written warranty of 3–5 years is commonly requested for commercial LED lamps, subject to operating conditions and exclusions. | Clear warranty coverage reduces replacement risk and establishes expectations for failure rates and operating conditions. | Review warranty duration, remedy process, batch traceability, sample testing, inspection criteria, and spare-unit policy. |