| Input Power | 12–40 W | Determines electricity consumption and heat generation. | Check the rated wattage on the product label and technical datasheet. | Confirm compatibility with the local electrical system and fixture rating. |
| Luminous Efficacy | 100–130 lm/W | Higher efficacy produces more light from each watt of electricity. | Calculate: lumens ÷ watts. Use tested total luminaire output where available. | Compare products using the same test method and operating conditions. |
| Total Light Output | 1,200–5,200 lm | Indicates the amount of visible light produced by the bulb. | Review the measured lumen value, not only the claimed watt-equivalent. | Choose output according to mounting height, room size, and intended application. |
| Incandescent Replacement Reference | 75–300 W equivalent | Provides a familiar reference for buyers replacing traditional lamps. | Use lumens as the primary comparison; watt-equivalent values are approximate. | Local labeling rules may restrict or define equivalent-lamp claims. |
| Color Temperature | 2,700–3,000 K: warm white 4,000–4,100 K: neutral white 5,000–6,500 K: daylight | Changes the visual appearance and atmosphere of the space. | Check the correlated color temperature (CCT) and color-tolerance information. | Warm light suits hospitality and residential areas; daylight suits warehouses and workspaces. |
| Color Rendering Index | CRI (Ra) ≥80 CRI (Ra) ≥90 for color-critical areas | Shows how naturally common colors appear under the light source. | Look for a test report listing Ra and, when relevant, R9 performance. | Retail, art, food, healthcare, and inspection uses may require higher color rendering. |
| Flicker Performance | Low flicker; preferably documented by test data | Excessive flicker may cause visual discomfort or affect camera recordings. | Request flicker percentage, flicker index, or modulation data at the intended voltage. | Check performance across the full rated input-voltage range and with dimmers if applicable. |
| Power Factor | ≥0.90 preferred for commercial projects ≥0.70 may be acceptable for some small lamps | Higher power factor generally reduces reactive current in larger installations. | Review measured power factor at rated voltage and frequency. | Commercial specifications or local regulations may set minimum requirements. |
| Input Voltage | Common global ranges: 100–277 V AC or 85–265 V AC | Determines whether the bulb can operate safely in the target market. | Verify rated voltage, frequency, surge protection, and regional certification. | Do not assume a bulb designed for one voltage range is suitable worldwide. |
| Operating Temperature | Typically around −20°C to +45°C ambient, subject to design | Temperature affects LED output, driver life, and reliability. | Check the specified ambient-temperature range and installation clearances. | High-temperature locations require careful heat dissipation and fixture ventilation. |
| Rated Life | 25,000–50,000 hours | Longer rated life can reduce replacement frequency and maintenance cost. | Confirm whether the rating refers to LED package life, driver life, or complete lamp life. | Review the stated lifetime standard, operating temperature, and warranty conditions. |
| Beam Distribution | Typically 120°–360°, depending on bulb construction | Determines how evenly the lamp illuminates the surrounding area. | Request a photometric file or beam-angle specification. | Check whether the fixture is open, enclosed, directional, or suitable for high-bay use. |
| Dimming Capability | Only select “dimmable” models when required | Not all LED drivers work correctly with existing dimmers. | Confirm compatible dimmer types, minimum load, dimming range, and flicker behavior. | Compatibility varies by country, dimmer technology, and installed wiring. |
| Energy Use Example | 18 W used for 4 hours/day = 26.28 kWh/year | Creates a consistent basis for comparing annual electricity consumption. | Calculation: watts ÷ 1,000 × daily hours × 365. | Multiply annual kWh by the buyer’s local electricity tariff to estimate operating cost. |
| Required Documentation | Datasheet, test report, safety certification, warranty, and photometric data | Documents help confirm performance, safety, and market suitability. | Check that documents identify the same model, ratings, revision, and test conditions. | Certification requirements differ by destination country and product application. |