Smart urban lighting, Sustainability
Modernise the network, pay from what it saves
Quick summary
Municipalities that want to modernise street lighting often stall on one obstacle: there’s no capital in the budget for it. The ESCO model removes that obstacle by having an investor fund the new luminaires and Lusety Lightwave controllers upfront, with the municipality repaying the investment purely from the electricity it saves – never from its own budget. For the Rokiškis project, payback is calculated at roughly 2.8 years; across projects generally, payback ranges from 3 to 7 years depending on how old and inefficient the existing luminaires are. Savings aren’t estimated – certified power supply units inside each luminaire measure real consumption and report it live on the HORIZON platform, so a city can verify its own numbers rather than take a vendor’s word for it. For municipalities with ageing infrastructure and no capital to spare, this turns a lighting upgrade from a budget line into a self-funding project.
The budget problem
Many municipalities want to modernise street lighting but face two separate obstacles. The first is capital: there is no line in the budget for a full luminaire replacement. The second is timing: luminaires replaced within the last few years still work, and writing them off early is a hard sell politically, even when a smarter system would save money.
The ESCO model solves the capital problem directly. It does not solve the second one – a municipality that just replaced its lighting fleet is not a good ESCO candidate yet, regardless of financing terms.
How the ESCO model works, step by step
- An investor finances new luminaires fitted with Lusety Lightwave controllers.
- Installation runs the same plug-and-play process as any other Lusety deployment – no separate control cable infrastructure.
- The municipality starts saving on electricity as soon as the system goes live.
- Payments to the investor come out of those savings, not the municipal budget.
- Once the payback period ends, all the savings stay with the municipality.
The Rokiškis project shows how fast this can move: payback is calculated at roughly 2.8 years – faster than the typical 3-to-7-year range, because the luminaires being replaced are old and highly inefficient. Once the investor is repaid, every euro of savings after that point goes straight into the municipal budget.
How savings are measured and verified
Municipal trust depends on the savings being real numbers, not projections. Lusety measures them at the source: each luminaire’s power supply unit is certified and includes a metering function. Consumption data comes directly from that certified component, not from a dimming schedule or a theoretical model, and it shows up in real time on the HORIZON platform.
That distinction matters in a procurement conversation. A city can check its own numbers against the platform rather than taking a vendor’s estimate on faith.
The retrofit barrier, and why it’s about to loosen
The biggest obstacle to ESCO adoption is not financing. It’s the luminaire itself. A Lusety controller needs a Zhaga Book 18 socket to mount on, and older luminaires don’t have one. If a city replaced its luminaires within the last five years, those units still light up fine and there’s no appetite to pull them out and spend budget on the same job twice.
That barrier may be about to shift. A manufacturer Lusety is in discussions with is preparing to release a prototype adapter in August: a unit that mounts directly on the pole, with the Lusety controller attached to the adapter rather than the luminaire itself. Lusety saw the prototype at a trade show and is waiting on the production version. If it works as shown, a city could add smart control to an existing, non-Zhaga luminaire without replacing it – removing the main reason recently-modernised cities sit out the ESCO conversation.
When ESCO makes sense (and when it doesn’t)
- Makes the most sense: old infrastructure still running metal halide or sodium lamps, no recent replacement, and no capital available in the current budget.
- Still viable: LED luminaires installed without smart control, provided the savings margin from adaptive dimming and monitoring is large enough to support a reasonable payback period.
- Less suitable, for now: LED luminaires replaced very recently, where the consumption baseline is already low and the savings available don’t justify a new investment cycle yet – this is where the retrofit adapter could change the calculation.
Frequently Asked Questions (FAQ)
1. What is the ESCO model for street lighting modernisation?
An investor funds the luminaires and control system upfront. The municipality repays the investment from the electricity savings the new system generates, rather than from its own budget. Once the payback period ends, the savings become the municipality’s.
2. How long does the investment take to pay back?
It depends on the condition of the existing luminaires. For the Rokiškis project, payback is calculated at roughly 2.8 years. Across projects generally, payback runs from 3 to 7 years: closer to 3 years for old metal halide or sodium installations, closer to 7 years where the luminaires are already LED.
3. How are energy savings measured, and who verifies them?
Certified power supply units built into each luminaire measure actual consumption at the source. That data feeds directly into the HORIZON platform in real time, so the municipality can see the numbers itself rather than relying on a projection.
4. What happens after the payback period ends?
All savings from that point on stay in the municipal budget. The investor has been repaid in full, and there is no further obligation tied to the original investment.
5. Do luminaires need to be replaced to implement an ESCO project?
Usually, yes, unless the existing luminaires already have a Zhaga Book 18 socket. A prototype adapter expected in August from a manufacturer partner may allow Lusety controllers to mount on existing poles without replacing the luminaire, which would remove this requirement for some projects.
6. Can the municipality choose its own ESCO investor or does Lusety provide one?
Lusety supplies the hardware and platform; the ESCO financing arrangement itself is between the municipality and an investor. The structure has flexibility on who that investor is, based on how each project is set up.
Conclusions: financing street lighting without upfront capital
The ESCO model removes the single biggest reason municipalities delay a lighting upgrade: the lack of capital. When the investment pays for itself from measured energy savings, the only real question left is how fast – and that depends mostly on how outdated the existing luminaires already are.
Key takeaways:
- An investor funds the luminaires and Lusety Lightwave controllers upfront; the municipality repays only from the electricity it saves.
- For the Rokiškis project, payback is calculated at roughly 2.8 years; across projects generally, payback runs from 3 to 7 years depending on the age of the existing luminaires.
- Savings are measured, not estimated – certified power supply units inside each luminaire report real consumption live on the HORIZON platform.
- The main barrier to adoption is the luminaire itself: a Lusety controller needs a Zhaga Book 18 socket, which older luminaires don’t have.
- A prototype pole-mounted adapter expected in August could let cities add smart control without replacing non-Zhaga luminaires.
- Once the investor is repaid, 100% of the ongoing savings stay in the municipal budget.
Learn more
Do you have questions about whether an ESCO structure fits your current lighting infrastructure? We’d be happy to model a payback estimate for your municipality.
Email us: info@lusety.com
Call us: +370 649 912 22