LED lighting for RATP metro and RER stations
The conventional light bulbs in 368 RATP metro and RER stations are being replaced by LEDs. Entirely financed by RATP, the 3-year programme will extend through late 2015 and will affect all metro and RER passenger areas.
RATP is renovating station lighting by switching to new LED lights
250,000 lighting units will be replaced covering about 1 million m², including 300 km of newly lit platforms and corridors. In 2016, RATP will be the first incumbent public transport network of its size to be fully equipped with LEDs in its passenger areas.
Franklin D. Roosevelt, the first metro station equipped with LEDs
In mid May 2013, the Franklin D. Roosevelt station was the first to benefit from this technology as part of the LED deployment plan. By year-end 2013, the majority of metro stations on lines 2, 4, 6 and 14 will switch to LED lighting, as well as the RER A stations between Vincennes and Marne-la-Vallée-Chessy and RER B stations between St-Rémy-lès-Chevreuse and Palaiseau. Thereafter, LED lighting will be installed in about a hundred metro and RER stations each year through late 2015.
Map showing metro stations already using LED lighting - February 2014
Map showing RER stations already using LED lighting - February 2014
Lighting in 50 stations already overhauled!
What does the switchover to LED entail?
Conventional light bulbs and fluorescent tubes will be replaced by LED lamps, without modifying existing facilities. Renovation work will be done at night, outside of normal operating hours.
• Why replace existing lighting units with LEDs?
Today, the power consumption of transport spaces accounts for about 12% of RATP’s overall energy consumption and 19% of its electrical power consumption.
Switching all of its conventional lighting sources to LEDs will reduce the energy consumption necessary to light the metro and RER networks by 50% (equivalent to the total consumption of a metro line). It will also reduce related greenhouse gas emissions by a similar amount. The LED deployment project is part of RATP’s energy and climate change policy, which aims to reduce energy consumption and greenhouse gas emissions by 15% at constant scope by 2020 (from the 2004 level).
• Preparations for the switch to “100% LED”
Very early on, RATP took an interest in LED lighting, which offers numerous environmentally-friendly advantages. A series of trials were carried out in 9 metro stations and 3 RER stations. All of the lights in the Censier-Daubenton metro station were replaced as of 2009, followed by the lights in the RATP head office in 2010 and the company’s industrial facilities in 2011, along with the RER A Val d’Europe station. These trials in real-life conditions helped validate the technology based on passenger surveys and detailed technical analyses and measurements. On the strength of these experiences, RATP decided to generalise the use of LED lighting throughout the metro and RER networks.
A successful trial
Performance measurements of the Censier-Daubenton station (line 7) are highly promising: they show energy savings of about 65% for lighting, and a reduction of greenhouse gas emissions of 15 tonnes of CO2 equivalent per year.
What is an LED?
LED in the acronym for Light Emitting Diode.
The LED is an electronic component capable of emitting light when an electrical current passes through it. This tiny component is already part of our daily lives: the indicator lights on household appliances, for example, are LEDs. Only in the past few years, however, have LEDs been adapted for use in lighting.
• Who is RATP’s LED supplier?
After a European bid to tender, RATP awarded the LED lighting contract for its metro and RER stations to the consortium PHILIPS/STEP and the company SOITEC.
• What are the benefits of LEDs?
LEDs offer numerous benefits. For example, by replacing fluorescent tubes with LEDs in the corridors of the Franklin D. Roosevelt station, RATP consumes 2 to 3 times less energy for the same luminosity and for higher quality lighting. LEDs consume 5 times less energy than an incandescent lamp and theoretically last 25 to 50 times longer. DC-powered LEDs require less than 5 volts.
480 LEDs consume less than a single light bulb!
With a much longer lifespan than previous lighting units, LED lights will require fewer maintenance and replacement operations in the future, which considerably reduces waste. Fluorescent tubes must be replaced within 2 years while LEDs should last more than 5 years.
LEDs are more economical!
The overall medium-term cost is divided by three thanks to savings on power consumption, maintenance and the replacement of LED units.
LEDs generate less waste because they have a longer lifespan.
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Did you say “sustainable”?
Granted, we are replacing energy intensive light sources by LEDs. But this programme also complies with a European directive on the eco-design of energy-related products, by increasing the share of recyclable materials and by respecting the environment.
• What happens to the old lighting units?
They are collected and recycled by RECYLUM, a certified eco-friendly entity for managing the collection and recycling of used lighting units. The old lighting units will be recycled, as will all used LEDs in the future.
• Preparing for the switchover to LEDs…
Architects and lighting engineers play a key role in the upstream phase of the project. Light is above all a question of feeling, but a pleasantly lit space depends on a multitude of criteria, some of which sometimes interact. When studying an area, these experts ask questions about the positioning of light sources to avoid the risk of glare. Direct or indirect light? At what height? What colour are the surface areas? How will light be distributed within the area? Will it be uniform? Warm or cold lighting? Depending on these criteria, light will work differently in different areas. They must also study the way in which different light sources work together, for example, natural lighting from a light well with artificial lighting. Lastly, it is important to be familiar with the areas and their constraints: the treatment of volumes, colours, materials, operating constraints, standards, dust, maintenance...
All these parameters are used to define appropriate lighting systems in terms of equipment, power and the positioning of lighting units within different areas.
“Light story”, an illuminating exhibition!
With the lighting renovation of the Franklin D. Roosevelt station, the first metro station equipped with LEDs, RATP, in partnership with PHILIPS and RECYLUM, hosted an exhibition that shed light on the metro lighting system and the transition from incandescent lights to LEDs, from May to July 2013, on the platforms of line 9.