Majestic antenna

The Cosenza Bridge from Calatrava over the River Crati | IT

Infrastructural lighting comes into its own with LED technology: relatively low power and dynamic light transform major structures into important urban points of reference, even by night. The Cosenza bridge, dedicated to Saint Francis of Paola and designed by famous Spanish architect, engineer and sculptor Santiago Calatrava, is a perfect example of this. Inaugurated in January 2018, this is one of the most important works to have been constructed in Southern Italy over the last few years.

Photography © Clorinda Scura, Scura Design – Corigliano

Photography © Clorinda Scura, Scura Design – Corigliano

Photography © Clorinda Scura, Scura Design – Corigliano

Photography © Clorinda Scura, Scura Design – Corigliano

Photography © Clorinda Scura, Scura Design – Corigliano

Photography © Clorinda Scura, Scura Design – Corigliano

Photography © Clorinda Scura, Scura Design – Corigliano

Its majestic antenna, destined to be an iconic structure for the city, crosses the waters of the Crati river and links the Gergeri quarter with the Old Town.

Calatrava set out to design a "harp-shaped" bridge: Suspended by a 104 metre-high pylon, rising at an angle of 52 degrees, and spanning 140 metres in length, all supported by a stretch of seemingly unending cables, which are reminiscent of the strings of a harp. The bridge is subdivided into four lanes for traffic—two in each direction—separated by a slightly elevated central pedestrian walkway.

Photography © Clorinda Scura, Scura Design – Corigliano

The aim of the lighting project was twofold: firstly, to enhance the view of the great “antenna” from afar, and secondly, from a functional point of view, to provide a source of illumination for vehicles and pedestrians.

The spectacular lighting system consists of forty 88 W Large Contrast LED spotlights , each with a narrow 8° beam angle and a colour temperature of 4000 K, the optimal choice for enhancing the structure’s white body. Each equipped with refractors and an anti-glare visor, the lights produce a dazzling yet uniform glow along the antenna, ensuring maximum visual comfort for pedestrians in the central walkway. All lights are fitted with an RGB LED PCB, which together with a DMX controller, can be used to create dynamic light shows for special events and can be synchronised with music to mimic a giant harp. The design also includes side lighting along both the traffic and pedestrian lanes, with lights installed into the lower part of the railings to create a welcoming "carpet of light".

Photography © Clorinda Scura, Scura Design – Corigliano

For this, the chosen fixtures are Zumtobel 15 W Tubilux LEDs, which produce a continuous stream of light.

The cables chosen for the design are simple and extremely slim, with a mechanical anchoring system for easy insertion into the structure of the bridge, saving time and money during the installation phases.

Photography © Clorinda Scura, Scura Design – Corigliano

Facts and figures—Product technical information

Thanks to the use of LED lighting fixtures, the design has achieved around a 60% reduction in energy consumption, dropping substantially from 96.760 W for the first design, which required the use of metal-halide and linear fluorescent lamps, to just 37.300 W consumption.

Autore: Giordana Arciselai

 

Contrast 2 LED, Large
-  colour temperature of 4000 K, with ultra-narrow 8° beam angle
- body: Sandblasted silver-grey EN AC 47100 DF die cast aluminium (Akzo Nobel 150)
- glass: tempered, 4 mm thickness
- accessories: retractors and anti-glare visor
- seal: EPDM
- screws: stainless steel
-  simplified angling with tiered bracket, held in position using Ø6 mm socket-head screws for all sizes.
- Large RGB: Large RGB DMX: 4 cable glands. 2 for DMX IN/OUT and 2 power supply
IN/OUT

Tubilux

- Light distribution: STD - standard
- Light source: LED
- Luminous flux of luminaire*: 1435 lm
- Luminaire efficiency*: 96 lm/W
- Min. colour rendering index: 80
- Correlated colour temperature*: 4000 Kelvin
- Rated median useful life*: 50000h L90 at 25°C