LED public lighting renovation: the method for municipalities

LED public lighting renovation has become a major lever for municipalities, at the crossroads of three issues: energy sufficiency, budget control and the regulatory phase-out of discharge lamps. Carried out well, it greatly reduces consumption and maintenance while improving users' visual comfort. A structured approach is still needed, from audit to funding. And it does not concern only roads and car parks: sports facilities · gymnasiums, multi-sports halls, pitches and stadiums · form the second major lighting item for municipalities, often the most energy-intensive and the most outdated. Here is the method.

Step 1: audit the existing installation

Every renovation begins with an inventory. The audit lists the light points, their technology (high-pressure sodium, mercury vapour, metal halide, fluorescent, LED), their power, the condition of the columns and cabinets, and the associated consumption. It identifies the discharge sources condemned by European regulations, whose withdrawal from the market is staggered up to around 2027 for certain high-intensity lamps. This inventory makes it possible to prioritise interventions and to target first the sites that consume the most energy or are most exposed to the risk of failure. Sports facilities occupy a leading place in it: stadium and pitch floodlights, gymnasium or multi-sports hall lighting are often among the oldest and most energy-hungry items of municipal property, while 85 % of French sports facilities are considered ageing and more than 70 % of the country's 325,000 sports facilities belong to municipalities. The regulatory transition is detailed in our article on the end of discharge lamps.

Step 2: the photometric study, the foundation of sizing

Replacing a luminaire is not simply a matter of swapping a source for an LED of equivalent power. Each road has requirements for illuminance level (lux), uniformity (U0) and glare control, depending on its function (main road, residential street, square, car park). Sports facilities follow their own reference framework, the NF EN 12193 standard, which sets illuminance (500 lux for a regional-level multi-sports gymnasium, up to 750 lux in national class and 1,000 lux in competition), a uniformity U0 > 0.7, controlled glare (UGR < 22) and a vertical component of at least 30 % · all criteria that a dedicated photometric study must check for gymnasiums as well as for outdoor pitches. A photometric study carried out in DIALux software models the street, simulates the layout of the luminaires and checks compliance with the requirements before any purchase. It avoids oversizing (waste and light pollution) as well as undersizing (dark areas, insecurity). To understand the value of this step, see our article why carry out a photometric study before buying.

Step 3: choose high-performance luminaires

LED brings gains on several levels. First on luminous efficacy: the best ranges reach 170 to 200 lm/W, which reduces installed power for the same illuminance. Then on lifetime, measured by the L70/L80 indicators, which drastically limits maintenance interventions. Finally on robustness, with IP and IK ratings suited to outdoor use. The choice must also take into account colour temperature (favour warm shades, often ≤ 3000 K, to limit the impact on biodiversity) and a good CRI. Discover our solutions for traffic routes, for example the GALAXY HP linear luminaire at 170 lm/W. For sports facilities, the priority shifts to impact resistance (IK10, ball protection), controlled UGR and an optic specific to each discipline: floodlights such as the FluxoSport M22 or the padel linear luminaires PadLuster and PadLum meet these needs.

Focus: sports facilities, the second lighting project for municipalities

After traffic routes and car parks, sports facilities are the most strategic lighting item · and often the most energy-intensive · of municipal property. France has nearly 325,000 sports facilities, more than 70 % of which are the responsibility of municipalities, and 85 % of this stock is considered ageing: gymnasiums, multi-sports halls, football, rugby, tennis, padel or basketball grounds combine energy-hungry floodlights and degraded visual comfort. This is where LED renovation offers one of the fastest returns on investment.

These facilities fall under their own regulatory framework, the NF EN 12193 standard, which requires illuminance levels, uniformity (U0 > 0.7), controlled glare (UGR < 22) and a sufficient vertical component, varying according to the discipline and the level of play. Each federation applies these requirements in its own way: find our dedicated guides to lighting a football pitch (FFF), a rugby pitch (FFR), a tennis court, a padel court (FFT) or a basketball hall (FFBB), as well as our analysis of UGR on sports grounds.

A compliant LED renovation, combined with dimming and detection, reduces the consumption of sports facilities by 50 to 70 % while improving visibility. On the funding side, beyond CEE, the energy renovation plan for sports facilities of the French National Sports Agency (ANS) specifically supports the installation of LED floodlights, while municipal gymnasiums can draw on funding from the ACTEE programme. Discover our sports lighting solutions, including the FluxoSport M22 floodlight.

Step 4: control, night dimming and dark corridors

LED lends itself to control, which multiplies the savings. Night dimming (reducing power in the middle of the night, when traffic falls) and partial switch-off reduce the bill and light pollution. In sports facilities, dimming and presence detection are just as decisive: combined with a compliant LED renovation, they reduce consumption by 50 to 70 % while matching illuminance to the level of play (training, competition, maintenance). The dark corridor network (trame noire), which aims to preserve corridors of darkness for nocturnal biodiversity, is integrated directly into the lighting strategy. Presence detection, programmed dimming and time-based scenes make it possible to fine-tune the service provided to the reality of use.

Step 5: fund the renovation

Funding determines the pace of the project. Several schemes can be combined:

• Energy Savings Certificates (CEE): they reward the savings generated by replacing energy-hungry luminaires and can cover a significant share of the investment.
• Grants and aid for the renovation of public lighting installations, available depending on the area and the programmes in force.
• The return on investment from energy and maintenance savings, which reduces the net cost over time.

Sports facilities benefit from earmarked funding (National Sports Agency, CEE for gymnasiums), which can be combined with the return on investment. Multi-year phasing makes it possible to spread the effort by dealing first with priority sites. For areas that are difficult to connect, solar public lighting offers an alternative without trenching.

FAQ

How long does a public lighting renovation take?

It depends on the size of the installation and on funding. Many municipalities opt for a multi-year plan that first deals with the main roads and the condemned discharge sources, then gradually extends the renovation.

Is the photometric study essential?

Yes. It guarantees that the LED luminaires will meet the expected illuminance (lux) and uniformity (U0) levels for each road, and avoids any under- or oversizing before purchase.

Do CEE fund the whole project?

Rarely all of it, but they often cover a significant share. The amount depends on the extent of the energy savings generated and is combined with other aid and with the return on investment.

Does night dimming reduce safety?

Properly set up, no. It reduces power during hours of low traffic while maintaining a suitable level of service. Presence detection even makes it possible to raise illuminance temporarily when someone passes.

Need a photometric study?

The audit and the photometric study are the work of a lighting design office: we recommend the expertise of the Luminance Consulting agency, the lighting design office that contributes to developing our ranges of luminaires based on an in-depth analysis of the needs of the most demanding customers. Luminance carries out the audit of your installation, the DIALux study and the compliance check. Rexylum, for its part, designs and supplies the prescribed luminaires and lighting solutions: for the choice of equipment, contact us.