This is an operation that consists of replacing old or obsolete components with newer components without changing the initial function of the object. In practice for us, the idea is to keep the original luminaire, and to replace obsolete bulbs (mercury, sodium, fluorescence) by a LED lighting, less greedy in energy.
In this way, it is possible to keep the original structure of the lamppost without having to replace it entirely. Beyond an obvious concern for ecology reducing waste, this approach is part of a heritage conservation movement. In effect, a retrofit allows to keep a work done years ago by a local craftsman and to ensure that part of the heritage of a region does not disappear in favor of a new light point from a delocalized factory. Let’s think especially of the medieval towns / villages, for which the lanterns and other luminaries give to the place the atmosphere and the attraction of another time. Charm that would be altered by replacing lighting with new infrastructure.
A duration of about 100’000 hours, a luminous efficiency of 120 lm / w to 150 lm / w, several color temperatures, a decrease in light pollution, possibility to be combined with motion detectors … LED lamps have many advantages that largely justify the replacement of old components for their benefit.
Make something new with the old, an ever more current trend to save part of its history and limit the elimination of bulky waste. A beautiful way to preserve its cultural and environmental heritage.