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IEC 62722-1:2014 โ Luminaire Performance Part 1: General Requirements
💡 Key Insight: IEC 62722-1 is the first international performance standard for luminaires, filling a critical gap between safety requirements (IEC 60598 series) and the need for standardized performance data. It enables fair comparison across manufacturers and supports energy-efficient lighting design.
1. Scope and Structure
IEC 62722-1:2014, prepared by SC 34D (Luminaires) of IEC TC 34, establishes general performance and environmental requirements for luminaires incorporating electric light sources operating at supply voltages up to 1 000 V. This first edition replaces IEC PAS 62722-1 (2011) and introduces significant technical changes, particularly in photometric distribution comparison methodology (Annex D). The standard was developed in response to industry demand for harmonized performance metrics that would enable meaningful comparison across different luminaire types and manufacturers.
The standard covers performance data for luminaires in a condition representative of new manufacture. It explicitly excludes semi-luminaires and notes that decorative/household luminaires may not be appropriate for all performance provisions. The structure allows for future Part 2 standards (specific light source types) and Part 3 standards (application-specific criteria such as floodlighting or street lighting). This modular approach ensures that the standard can evolve as new lighting technologies emerge without requiring a complete revision of the base document.
| Data Category | Required Information | Measurement Standard | Tolerance |
|---|---|---|---|
| Photometric data | LOR or total luminous flux, luminous intensity distribution | CIE 121 | ≤10% below rated value |
| Electrical data | Rated supply voltage, input power, standby power, emergency charging power | Annex B | ≤10% above declared value |
| Luminaire efficacy | LOR × (Rated lumens × BLF) / Input power | Per manufacturer declaration | Refer to light source standards |
| Environmental data | Materials compliance, maintenance instructions, disassembly/recycling instructions | Local regulations + Annex C | Informative |
2. Photometric Performance Verification
One of the most technically significant aspects of IEC 62722-1 is the detailed methodology for verifying photometric distribution data. Annex D provides a rigorous comparison framework that ensures measured luminous intensity distributions match manufacturer-declared values within acceptable tolerances.
The verification process compares normalized maximum intensity values (cd/klm) across five half-planes (C0, C90, C180, C270, and C Imax) and five γ angles (Imax plus the four nearest readings). The acceptance criterion is ±20% for corresponding values. Four distinct scenarios are defined to handle cases where intensity peaks occur at different C-planes or γ angles than declared.
✅ Engineering Insight: The ±20% tolerance on photometric distribution data accounts for normal manufacturing variations. However, when designing critical lighting installations (e.g., sports stadiums or road tunnels), engineers should specify tighter tolerance requirements in procurement documents. The standard allows for rotation of the measured distribution within C ± ΔC as long as intensity values remain unchanged — a practical concession acknowledging that absolute orientation alignment between measurement and declaration is not always achievable.
The measurement resolution requirements vary by luminaire type:
- General and emergency lighting: ΔC = 15°, Δγ = 5°
- Floodlights and spotlights: Per CIE 43 with close stepping around Imax
- Street lighting: Per CIE 34
3. Electrical and Efficacy Performance Requirements
The standard defines three distinct electrical power measurements that must be declared: input power (normal operation), standby power (lamps off via control signal), and emergency lighting charging power (battery maintenance). For emergency luminaires, charging power is measured with batteries fully charged and lamps off, averaged over a 24-hour period if power varies with time. These three measurements provide a complete picture of the luminaire’s electrical behaviour throughout its operational lifecycle, from normal operation to standby and emergency modes.
Luminaire efficacy is calculated as the ratio of total luminous flux to input power (excluding emergency charging power), expressed in lumens per watt. The standard notes that efficacy data can be derived from LOR × (Rated light source lumens × BLF) / Input power. This approach allows manufacturers to provide efficacy data without needing to photometrically test every combination — a practical concession that recognizes the vast number of light source and controlgear combinations available.
⚠️ Important Consideration: When measuring luminaire power, the standard requires inclusion of all lamp(s), controlgear, and other components at normal full output or maximum light output if dimming is supported. For dimmable luminaires, this means the declared input power must represent the worst-case (maximum) power consumption, not the typical dimmed operating point.
4. Environmental Responsibility and End-of-Life Provisions
A forward-looking aspect of IEC 62722-1 is its inclusion of environmental data requirements. Manufacturers must ensure materials comply with local hazardous substance regulations, provide maintenance instructions to support long product life, and include disassembly instructions to facilitate end-of-life recycling. Annex C provides standardized pictograms for servicing, cleaning, and disposal instructions — a small but significant step toward circular economy principles in lighting.
💡 Design Recommendation: Luminaire designers should incorporate the standardized pictograms from Annex C into product labels and user manuals from the initial design phase. Early integration of end-of-life instructions reduces compliance burden and demonstrates environmental stewardship — increasingly important for green building certifications such as LEED and BREEAM.
5. Frequently Asked Questions
Q1: What is the difference between IEC 62722-1 and IEC 60598-1?
IEC 60598-1 deals with safety requirements for luminaires (electrical shock, fire, mechanical hazards), while IEC 62722-1 covers performance characteristics (photometric data, electrical data, efficacy). They are complementary standards — both apply to the same luminaire but address different aspects of product quality.
IEC 60598-1 deals with safety requirements for luminaires (electrical shock, fire, mechanical hazards), while IEC 62722-1 covers performance characteristics (photometric data, electrical data, efficacy). They are complementary standards — both apply to the same luminaire but address different aspects of product quality.
Q2: How is luminaire efficacy calculated for LED luminaires?
For LED luminaires, luminaire efficacy = (LOR × Rated LED lumens × BLF) / Input power. Note that BLF (ballast lumen factor) for LED drivers is typically 1.0 since LED drivers do not have the same ballast factor variability as fluorescent control gear.
For LED luminaires, luminaire efficacy = (LOR × Rated LED lumens × BLF) / Input power. Note that BLF (ballast lumen factor) for LED drivers is typically 1.0 since LED drivers do not have the same ballast factor variability as fluorescent control gear.
Q3: Does the standard apply to smart lighting systems with networked controls?
Yes, standby power requirements cover luminaires with control signals. However, the standard’s scope is limited to the luminaire itself — the power consumption of external control systems (building management systems, occupancy sensors not integrated into the luminaire) is not covered.
Yes, standby power requirements cover luminaires with control signals. However, the standard’s scope is limited to the luminaire itself — the power consumption of external control systems (building management systems, occupancy sensors not integrated into the luminaire) is not covered.
Q4: What measurement instruments are required for compliance testing?
Voltmeters, ammeters, and wattmeters must conform to Class Index 0.5 or better (precision grade). Photometric measurements must follow CIE 121 for goniophotometry. The standard does not mandate specific instrument models but requires traceable calibration.
Voltmeters, ammeters, and wattmeters must conform to Class Index 0.5 or better (precision grade). Photometric measurements must follow CIE 121 for goniophotometry. The standard does not mandate specific instrument models but requires traceable calibration.
