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What smart street lighting costs, and when it pays back.
Every municipal conversation opens with this question and most vendor pages avoid it. We cannot publish a unit price, because it depends on your fixture mix and your procurement route. We can publish everything else: what you are actually buying, where the money comes back, and the one tariff question that decides whether the savings reach your invoice at all.
How much does smart street lighting cost, and when does it pay back?
Smart street lighting is normally costed as one project with an LED conversion rather than as a separate purchase, and the payback usually quoted on that combined project is four to eight years.
The cost is a node on each luminaire, a gateway for each group of up to 1,000 nodes, the management platform, and the labour to install and commission. The return comes from energy, where 50% to 70% is the range quoted when controls accompany an LED conversion, and from maintenance, where truck rolls fall 30% to 40% because a failed lamp reports itself instead of waiting for a patrol or a complaint. How much of the energy saving actually reaches the invoice depends on whether your utility bills you on a metered or an unmetered tariff.
What smart street lighting costs, and when it pays back.
What you are actually buying
A quote that is missing one of these layers is not cheaper, it is incomplete. This is the full list, so you can check a proposal against it.
- A node per luminaire: the external RME on an ANSI C136.41 or Zhaga Book 18 socket, or the internal RTM inside fixtures that have no socket. One part number covers 110 to 480 Vac, so there is no per-voltage inventory to hold.
- Gateways: one manages up to 1,000 nodes, so the count follows the density of your network, not only the number of fixtures. A spread-out rural network needs more gateways per luminaire than a dense downtown.
- The management platform: Dimonoff | SCMS, or DOO Express where a smaller project does not need the full enterprise feature set.
- Installation labour: the controller plugs into the socket in seconds and identifies itself on the mesh, and commissioning is guided from the mobile app with geolocation and an instant functional test. This is the line most affected by whether you are already changing the fixture.
- Training, which is included rather than quoted separately: three tracks, for operations, for field technicians, and for IT on the API, the integrations and security.
Where the money comes back
Two savings lines, and they behave differently. Energy is immediate and continuous. Maintenance takes a season to show up, and then keeps compounding as fault detection replaces patrols.
What municipalities have published about their own networks, with the distinction that matters in a business case: Mississauga is a measured result, and reports 55% lower energy costs against its 2011 baseline, metered in the node, on a 50,000-luminaire conversion. Montréal set a target of 35% lower energy and 55% lower maintenance across 132,500 luminaires. Laval set out CA$2.75 million a year, 15 million kWh a year and 10,607 tonnes of CO2 a year, with a stated five-year return.
- Energy: 50% to 70% is the range quoted when networked controls accompany an LED conversion.
- Maintenance: 30% to 40% fewer truck rolls, because a failed lamp, a power fault or a lost connection raises an alarm on its own.
- The alarm becomes a work order in Oracle EAM or any CMMS through the API, so the saving is in the crew’s schedule rather than in a report nobody reads.
The tariff question that decides your payback
Ask your utility how it bills your street lighting before you model any dimming savings. It is the question that changes the answer most, and it is rarely asked early enough.
Under an unmetered street lighting tariff, the utility bills the city for an assumed load per fixture. Dimming does not change that assumed load. So a network can dim every night, genuinely use less electricity, and see none of it on the invoice — the saving is real in physics and invisible in accounting.
Revenue-grade metering in the node is what closes that gap: ±0.5% accuracy to ANSI C12.20, per fixture, which gives the city a measurement it can take to the utility. If you are on an unmetered tariff, that metering is not a specification detail, it is the mechanism by which the adaptive-control half of your business case becomes collectable.
What moves the payback, up or down
The four-to-eight-year range is wide because these variables move it. Knowing which apply to you is most of the estimating work.
- Whether the LED conversion is happening anyway. Controls added to a conversion already budgeted are a much shorter payback than controls bought alone, which is why the published figures describe the combined project.
- How you are billed, per the section above.
- Grant funding. FCM Green Municipal Fund, provincial programs in Quebec, Ontario and Alberta, IIJA, NYSERDA and DOE Better Buildings all reach municipal lighting, and Dimonoff prepares the documentation the application requires.
- The procurement route. Buying under the Sourcewell contract 041525-DIMN or through the Canoe Procurement Group removes a full tender from the schedule, and months of delay are a real cost against a grant deadline.
- What you already own. A platform that manages nodes from other manufacturers turns phase two into a migration instead of a replacement, which is the difference between extending an investment and writing it off.
How to get a number you can defend
A vendor’s spreadsheet does not survive a council meeting. A measurement from your own network does.
A three-month pilot on 100 to 500 luminaires, on production hardware and a live platform, produces energy and fault figures from your streets, on your tariff, with your fixture mix. That is the number to build a business case on, and it is also the documentation a grant application asks for. Full deployment of 10,000 to 50,000 luminaires then runs 6 to 18 months from signature to full operation.
No unit prices appear on this page, deliberately. Cost per luminaire depends on your fixture mix, the density of your network, the gateway count that density implies, and the procurement route you use, so any figure published here would be wrong for most readers. Ask for a quote against your own inventory.
Questions about cost and return
How much does a smart streetlight controller cost?
Dimonoff does not publish unit pricing, because the figure that matters is the installed cost across your network, and that depends on your fixture mix, how many gateways your network density requires, and whether you buy through a tender or a cooperative contract. Send your fixture inventory and you get a quote against it. Public agencies in Canada and the United States can also buy under Sourcewell contract 041525-DIMN, which is already competitively solicited.
What is the payback period on smart street lighting?
Four to eight years is the range typically quoted for a project that combines an LED conversion with networked controls. Laval published a stated return of five years on its own project. Where your network lands in that range depends most on whether the LED conversion was already budgeted and on whether your utility bills you on a metered or an unmetered tariff.
Do the controls pay for themselves without an LED conversion?
The published savings figures describe the combined project, so they should not be read as the return on controls alone. On a network already converted to LED, the case rests on the maintenance side — 30% to 40% fewer truck rolls from automatic fault detection — plus adaptive dimming and per-fixture metering, rather than on the lamp change. A pilot on your own network is the honest way to size that.
Are there grants that cover this?
Yes, and networked controls are generally presented as part of the same energy-saving measure as the fixtures rather than as a separate item. The FCM Green Municipal Fund in Canada, provincial programs in Quebec, Ontario and Alberta, and IIJA, NYSERDA and DOE Better Buildings in the United States all reach municipal lighting. Program rules change every year, so confirm eligibility with the program before building a schedule around it.
Send us your fixture inventory.
We will come back with what a pilot on 100 to 500 luminaires would measure on your network, and a quote against your own count rather than a generic figure.