The values that matter, and typical figures.
Learning Track · Module 2: Luminaires · Step 7 of 101
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| Value | What it tells you | Typical for LED road lighting |
|---|---|---|
| Luminous flux (lm) | Light out of the complete luminaire | 2,000 to 30,000 lm |
| Efficacy (lm/W) | Light for each watt of the complete luminaire | 130 to 180 lm/W |
| CCT (K) | Colour of the light. Lower is warmer. | 2200 K to 5700 K |
| CRI (Ra) | How true colours look | 70 or more |
| Uplight | Light above the horizontal | Europe, Middle East, South Asia: ULOR 0% USA: BUG rating U0 |
| IP rating (IEC 60529) | Protection against dust and water | IP66 |
| IK rating (IEC 62262) | Protection against impact | IK08 to IK10 |
| Power factor | How well the driver uses current | 0.95 or more at full power |
| Surge protection | Rating against surges | 6 kV to 20 kV |
| Ambient (ta) | Temperature range for rated performance | −40 °C to +50 °C or more |
| Lifetime | Hours to a stated light loss | Europe, Middle East, South Asia: L80B10 at 100,000 h USA: L70 or L80 per TM-21 |
| Wind area (m²) | Side area that wind acts on | Needed for the pole calculation |
Check where the figures come from
- Flux and efficacy must be for the complete luminaire, measured to Europe, Middle East: EN 13032-4 or IES LM-79 South Asia: IS 16106 or IES LM-79 USA: IES LM-79. LED package figures are higher and do not count.
- Lifetime claims must come from LED test data (IES LM-80) and a projection (IES TM-21).
- Ask for the photometric file and a calculation for your road.
Sources
- IEC 62722-2-1 LED luminaire performance
- EN 13032-4 Photometric data for LED lamps, modules and luminaires
- IES LM-79 Optical and electrical measurements of solid-state lighting products
- IES LM-80 and TM-21
- IEC 60529 Degrees of protection (IP code)
- IEC 62262 Degrees of protection against mechanical impacts (IK code)
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