The words you will see in tenders, datasheets, and this site, from all four regions.
Learning Track · Module 14: Glossary · Step 101 of 101
- AECI: Annual energy consumption indicator (EN 13201-5). kWh per m² per year.
- ANSI C136.41: The 5-pin and 7-pin dimming receptacle, often called the NEMA socket.
- Astronomical clock: A timer that calculates sunset and sunrise from the date and location.
- Autonomy: Nights a solar light can run with no charge.
- Baseline: Energy use before a change, used to prove a saving.
- BIS CRS: India’s compulsory registration scheme for electronic products, including LED luminaires.
- BUG rating: Backlight, uplight, and glare rating of a luminaire (IES TM-15).
- Burn hours: The total time a light has been on.
- CCMS: Centralised control and monitoring system. Common term in South Asia and the Middle East.
- CCT: Correlated colour temperature, in kelvin. Lower is warmer.
- CE marking: The maker’s declaration that a product meets EU law.
- Class II: Double-insulated equipment with no protective earth connection.
- CLO: Constant light output. The driver increases power slowly to keep light the same.
- CMS: Central management system for street lights.
- Contactor: A heavy-duty switch in the cabinet that turns a circuit on or off.
- D4i: DALI for IoT. Standard data inside the luminaire: energy, diagnostics, luminaire data.
- DALI-2: Digital lighting control (IEC 62386) with certified interoperability.
- Day burning: Lights that are on in daylight.
- DLC: DesignLights Consortium. Its product list is used for US utility rebates.
- Driver: The control gear that supplies the correct current to the LEDs.
- ECAS: Emirates Conformity Assessment Scheme for regulated products in the UAE.
- eGRID: US EPA database of power sector emission factors.
- EN 13201: The European road lighting standard.
- ENEC: A voluntary European safety mark from an independent lab.
- ESCO: Energy service company. Pays for an upgrade and gets paid from savings.
- EULUMDAT: The European photometric file format (.ldt).
- Feeder pillar: The cabinet that supplies a group of street lights. Common term in the UK, Middle East, and South Asia.
- GFCI: Ground-fault circuit interrupter. The US term for a residual current device.
- IK rating: Protection against impact, IK00 to IK10.
- ILC, OLC: Individual lamp controller or outdoor luminaire controller. A node on one light.
- IP rating: Protection against dust and water.
- IS 1944: The Indian code of practice for lighting of public thoroughfares.
- LiFePO4: Lithium iron phosphate. The common battery type in solar street lights.
- LoRaWAN: A long-range, low-power network in unlicensed radio bands.
- Lockout/tagout: The US procedure to isolate and secure energy before work (OSHA 1910.147).
- LxBy: Lifetime format: hours until y% of luminaires give less than x% of first light.
- Luminaire: The complete light fitting: housing, optic, driver, and LEDs.
- MEWP: Mobile elevating work platform, for example a bucket truck.
- MPPT: Maximum power point tracking. A charge controller method that gets more energy from a panel.
- MTTR: Mean time to repair.
- MUTCD: US Manual on Uniform Traffic Control Devices. Part 6 covers work zones.
- NB-IoT, LTE-M: Cellular networks for low-power IoT devices.
- NRTL: Nationally Recognized Testing Laboratory, for example UL, Intertek, or CSA.
- PDI: Power density indicator (EN 13201-5). W per lux per m².
- Peak sun hours: Daily solar energy expressed as hours of full sun (1 kW/m²).
- RCD, RCCB, ELCB: Devices that trip when current leaks to earth.
- RP-8: ANSI/IES recommended practice for roadway lighting in North America.
- SABER: Saudi Arabia’s online platform for product conformity certificates.
- Scope 2: Greenhouse gas emissions from purchased electricity.
- SLA: Service level agreement. Maximum time to fix a job of each priority.
- Smart pole: A pole built to carry other services, such as cameras, small cells, or EV chargers.
- SPD: Surge protection device.
- TALQ: Interoperability specification between CMS software and outdoor device networks.
- uCIFI: A unified data model for smart city devices.
- ULOR: Upward light output ratio. Share of light above the horizontal.
- Uniformity: Lowest light level divided by the average.
- Unmetered supply: Street lighting billed from an inventory or flat rate, not a meter.
- Virtual midnight: Driver dimming that finds the middle of the night from past on and off times.
- Wi-SUN: A mesh network standard (IEEE 802.15.4g) for utility and city devices.
- Zhaga Book 18: A 4-pin socket for nodes and sensors on outdoor luminaires.