Royal Philips retrofitted the interior of Notre-Dame de Paris with more than 400 LED luminaires with an installed capacity of 30 kW, compared with almost 140 kW previously – reducing energy consumption by 80 percent.
The project used a horizontal, flexible, spinal column that extends for 300 meters, the length of the triforium. The 400 luminaires are operated by means of a computerized system, with a touch screen to simplify control. The system contains several lighting programs and Notre-Dame’s manager can add more if required.
Almost all of the luminaires are dimmable, making it possible to modify the lighting according to the event taking place, the time of day or the season.
The LEDs are expected to last around 13 years for 10 hours of lighting per day (switching on and off does not affect the lamps’ lifespan). In addition, LEDs were chosen because they require less maintenance, which is expensive in a structure with such tall ceilings.