Street Lamps

LED Lanterns: Advanced technology for public lighting and historic centres

The evolution of LED lanterns in exterior lighting responds to the need to combine classical or contemporary aesthetics with high-precision photometric performance. These post-top or suspended luminaires are designed to comply with the Regulation on Energy Efficiency in Outdoor Lighting Installations (RD 1890/2008, Spain), ensuring optimal light distribution on roads, squares and pedestrian areas.

Outdoor lighting: Energy efficiency and regulatory compliance

In technical specification, the lantern is not only evaluated as an ornamental element but as a tool of lighting engineering. The implementation of high-efficacy LED modules (above 130 lm/W) allows a significant reduction in energy consumption compared to discharge technologies, while maintaining illuminance uniformity in accordance with EN 13201.

Light pollution control (ULORinst)

One of the critical parameters in the selection of a lantern is the installed Upward Light Output Ratio (ULORinst). To comply with night-sky protection regulations, especially in areas of special astronomical protection, our technical lanterns guarantee ULORinst < 1%. This is achieved through internal optics that direct the flux exclusively towards the lower plane, eliminating the emission of direct light towards the upper hemisphere.

Thermal management and L90B10 service life

System longevity is determined by the heat dissipation of the optical block. The use of low-copper die-cast aluminium bodies and passive thermal management systems makes it possible to certify a service life of L90B10 > 100,000 hours. This figure is fundamental for reducing operational and maintenance costs in energy services contracts (ESCO).

Road optics and advanced photometry

Photometric versatility is essential to adapt to different road geometries. The lanterns incorporate optical-grade PMMA lenses with symmetric, asymmetric or road distributions, allowing increased spacing between supports without compromising uniformity or generating disturbing glare (G3/G4 according to the standard).

Connectivity and Smart City (NEMA/Zhaga)

To facilitate the transition to smart cities, today's lanterns integrate standardised connectors such as 7-pin NEMA or Zhaga Book 18. These interfaces enable "plug-and-play" installation of remote management nodes, motion sensors or photovoltaic cells, enabling point-to-point control and real-time consumption monitoring.

Comparative Table of Technical Specifications

Frequently Asked Questions (FAQs)

1. Why is the surge protection device (SPD) value critical in LED lanterns?

Due to their outdoor location and connection to public networks, lanterns are vulnerable to transient voltage peaks caused by lightning strikes or grid switching operations. A surge protection device (SPD) of at least 10kV is essential to protect the driver and LED module, preventing premature failures of the installation.

2. Which colour temperature is recommended to minimise impact on biodiversity?

Current regulations and recommendations from environmental bodies suggest the use of warm colour temperatures (< 2700K) or PC-Amber LED in rural areas or parks. These temperatures reduce emission in the blue spectrum, minimising insect attraction and disruption to the circadian cycles of local wildlife.

3. How is long-term sealing guaranteed in a manually opening lantern?

Sealing (IP66) is ensured through the use of high-recovery silicone seals and pressure-locking systems. It is vital that the lantern features a breathing system through valves that prevent internal pressurisation, extending the service life of electronic components.

4. What is the difference between a "Cut-off" lantern and a conventional one?

A Full Cut-off lantern is one designed not to emit any light above the horizontal plane (90°). This is a legal requirement in many communities to combat light pollution and improve efficiency, since all the emitted light is used on the useful surface.