An efficient and long-lasting model in Ciudad Amurallada, one of Colombia’s most iconic historic urban centers.

CARTAGENA DE INDIAS —27/2/2025— The historic center of Cartagena de Indias, the renowned Ciudad Amurallada, has modernized its public lighting system with efficient and sustainable technology, addressing issues of light pollution, low uniformity, and high maintenance costs due to corrosion. Through the collaboration of ATP Lighting and Greenlight S.A., innovative solutions have been implemented to enhance security and aesthetics while optimizing energy consumption and ensuring a long-lasting infrastructure. 

Cartagena de Indias, declared a UNESCO World Heritage Site in 1984, is a major cultural and tourist landmark in Colombia. Its historic center, with cobblestone streets, colorful facades, and colonial buildings, is one of the most visited areas of the city by both residents and tourists. The modernization of its lighting enhances its nighttime appeal and fosters social integration in its emblematic spaces.

Cutting-edge technology tailored to urban needs

Carlos Villamizar, Technical Director at Greenlight S.A., highlighted key aspects of the project: “Cartagena needed a lighting system that would respect its heritage, improve security, and reduce light pollution. We started with an outdated discharge technology installation, which resulted in high light dispersion into the night sky and poor uniformity. To solve this, we implemented six-sided luminaires with ATP’s 2200 K LED technology, ensuring uniform, glare-free illumination and a more pleasant experience for both pedestrians and drivers.”

The project included the classic Ronda A luminaire model with Comfort Diffuser® to eliminate glare, complemented by Atlas 3-meter columns, Coliseo 5-meter columns, and Atlas Plus 8-meter columns, with BS40 and BS70 ornamental arms. These complete sets of luminaire, arm, and column, made from advanced polymeric materials, offer total corrosion resistance, significantly reducing maintenance costs and extending infrastructure lifespan. The durability of the new material is backed by a comprehensive 10-year warranty, even under extreme conditions of temperature, humidity, and salinity.

Efficiency and sustainability benefits

Marisela Mercado, Operations Manager at the Hotel Sophia in the historic district, noted the positive impact of the transformation: “Previously, the luminaires were of low quality, many were corroded, and their operation was inconsistent, leaving dark areas at night. With the new lighting, the environment has taken on a more elegant and attractive appearance, significantly increasing nighttime tourist activity.”

Beyond optimizing energy consumption with savings exceeding 70%, the renovation project has created a more welcoming and secure environment, encouraging both commercial and tourist activity.

Mario Zapateiro, Director of Works at Escuela Taller, emphasized the importance of maintaining aesthetic coherence with the city’s colonial architecture. “We selected six-sided luminaires with a classic design to harmonize with the Ciudad Amurallada’s historical identity. Additionally, they are made from materials resistant to the Caribbean’s salinity, preventing aesthetic and functional degradation. Thanks to this decision, the lighting is now homogeneous and consistent with the area’s traditional aesthetics, improving public space perception and contributing to citizen security.”

Impact on security and the revitalization of public spaces

One of the most significant achievements of this project has been the revitalization of key landmarks such as Plaza de los Coches and Camellón de los Mártires. Tatiana Buriticá, Manager of NH Urban Royal Cartagena Hotel, highlighted the positive impact of the lighting transformation: “Before the renovation, the lack of proper lighting made these spaces feel unsafe. Now, citizens and tourists feel encouraged to explore, enjoy the scenery, and stay longer. This has fostered social integration and strengthened the city’s nighttime tourism.”

Reduction of light pollution and night sky protection

The new lighting in Ciudad Amurallada features ultra-warm 2200 K LED technology, emitting less than 1.28% of blue light at wavelengths below 440 nm. This reduction minimizes light dispersion in the atmosphere, preventing artificial skyglow and reducing the impact on coastal wildlife and circadian rhythms.

The lighting design of the project has been precisely calibrated to prevent over-illumination and ensure that light is directed exclusively where it is needed. This approach enhances not only energy efficiency but also the protection of Cartagena de Indias’ natural environment, aligning with environmental responsibility and night sky conservation standards.

A replicable model for heritage cities

The modernization of Cartagena de Indias' lighting represents a success story that can serve as a reference for other coastal heritage cities seeking efficient and sustainable solutions. With cutting-edge technology, innovative materials, and a design tailored to its unique environment, this project demonstrates how lighting can transform urban spaces while preserving their historical identity.

Through this initiative, Cartagena reaffirms its commitment to responsible development and innovation in public infrastructure, solidifying its position as a benchmark in implementing efficient and environmentally respectful lighting models that honor its architectural and cultural heritage.