Segunda Circular
Smart lighting improves visibility on one of Lisbon’s most congested roads using less energy
Segunda Circular is one of Lisbon’s major roads. It connects the city from east to west, and is a crucial link between motorways and other major roads in the Lisbon Metropolitan Area. At approximately 10 km long, the road carries between 110,000 and 130,000 vehicles daily, resulting in heavy traffic day and night along its entire length.
In 2025, the Lisbon City Council decided to replace all the existing columns and luminaires, as they were experiencing various problems in efficiency, maintenance and sustainability. The project had four main objectives:
- improve the quality of light;
- increase energy efficiency;
- reduce maintenance costs;
- ensure a smart, sustainable lighting infrastructure.
Improved quality of light
Schréder’s IZYLUM luminaires were chosen for this upgrade. Equipped with state-of-the-art LEDs and lenses, they offer excellent light output and photometry adapted to the road profile. The new installation provides a substantial improvement in lighting quality for the thousands of motorists who use this important road every day, thanks to greater light uniformity and a higher colour rendering index.
Energy-efficient public lighting
The new lighting with the IZYLUM luminaires reduced the installed power by 67.4% (from 200 kW to 65 kW), which represents annual savings of 543,000 kWh. This will reduce the city’s annual energy costs by over €81,000.
Reduced maintenance costs
With a service life four to five times longer than that of discharge lamps, LEDs significantly reduce maintenance costs. The new LED lighting will minimise disruption caused by maintenance operations, particularly on busy roads such as the Segunda Circular.
Smart lighting for optimised infrastructure
All IZYLUM luminaires are equipped with Zhaga controllers and are connected to the Schréder EXEDRA smart lighting system. This platform enables the city to adjust the lighting levels according to actual requirements and detects anomalies in real time. It will help the city save energy, reduce carbon emissions and optimise operating costs.
A more circular lighting infrastructure
The IZYLUM luminaire was designed from the outset to contribute to a more circular economy. It is manufactured from recyclable materials (aluminium and glass) and has tool-free access to the LED engine for easy maintenance and future upgrades with more advanced technologies.