1001 Smart Cities

Permanent project revision

LED Street Lighting: A Slow District Plan, Then One Big Procurement

Revision 2026-08-28-tartu-baseline · effective 2026-08-28

Current revision. This is the snapshot used by the live entity page.

unreviewed

Created the first structured Evidence Passport with 15 claims and 10 source dossiers.

sha256:da17596b6a3e5bfc237b0c58ebdf1be23a0c8c67012373fa680bb0aed63a068b
All revisions → Current entity page →

Change set

  • add /evidencePassport — Added claim-level evidence mapping and source dossiers.
  • add /revisionHistory — Established a permanent, hash-addressed baseline revision.
15
of 15 claims mapped
10
source dossiers
5
publication dates recorded
0
archives linked
0
exact locators
0
content captures hashed

Claims, one by one

The text below is copied verbatim from the published record. Each claim names the source dossiers that carry it; caveats stay attached to the claim they qualify.

Claim 1 clm-311d95825a4541cf quantitative
Tartu lit its streets with 11,547 mostly sodium lamps in 2014
Published field
snippet · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
The city page states that in 2014 Tartu had 321 km of lit streets with 11,547 lamps, of which 10,620 were HPS and 295 HID sodium-family lamps against 632 LEDs — 'mida valgustas 11 547 lampi. ... 10 620 olid HPS-valgustid, millele lisandus 295 HID-valgustit ja 632 LED-valgustit.' Table 5.11 of the climate plan carries the same 11,547 total for 2014.
Caveat
No claim-specific caveat recorded

Sources carrying this claim

  1. City of Tartu, street lighting page (operator)
  2. Tartu Energia 2030, the city's energy and climate plan (operator)
Claim 2 clm-b34621f0552d993c quantitative
resolved in 2015 to convert the whole stock to LED within nine years, one district at a time
Published field
snippet · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
Verbatim: 'Tartu linnavalitsus võtab eesmärgiks järgmise üheksa aasta jooksul asendada kõik allesjäänud HPS- ja HID-valgustid LED-valgustitega' and 'Järgneva üheksa aasta jooksul asendatakse igal aastal ühe piirkonna kõik valgustid' — the city is divided into nine lighting districts, one replaced per year. The passage sits in the section on 2015, which also records 600 of the highest-wattage HPS lamps replaced that year.
Caveat
The page carrying the plan was last modified in December 2020; the plan text itself dates from the 2015-16 planning round.

Sources carrying this claim

  1. City of Tartu, street lighting page (operator)
Claim 3 clm-4913bb8c726f9e72 quantitative
Under the EU SmartEnCity project the city fitted 320 centre-city luminaires with Cityntel radio controllers for remote switching and dimming in 2017
Published field
snippet · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
The July 2017 release announces the procurement — 'replacing the existing 320 sodium lights within the city centre area of Tartu with energy efficient LED lighting, within the framework of the SmartEnCity project' and 'Cityntel OÜ will install management controllers inside of all lighting fixtures, which will allow for the remote organisation of the operation of the lighting (switching on-off, dimming)'. The January 2018 Tark Tartu report describes the works as delivered: 'Kõikidesse valgustitesse paigaldas Cityntel OÜ juhtimiskontrollerid'. The consortium factsheet records 322 controllers produced by Cityntel.
Caveat
Completion was reported on 8 January 2018, so the last works may have run into the first days of 2018; the controllers use a wireless mesh, described in city materials as radio control.

Sources carrying this claim

  1. City of Tartu, news release on the SmartEnCity centre-city lighting procurement
  2. Tark Tartu, the city's smart-city portal, on the completed pilot installation
  3. SmartEnCity project, solution factsheet 'LED lights with smart controllers (Tartu)'
Claim 4 clm-c51d009f757e9fdf quantitative
the city's climate inventory counted 21.9 per cent LED in 2019
Published field
snippet · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
Table 5.11 of Tartu Energia 2030: 2019 — 3,062 LED luminaires, 10,942 non-LED, 14,004 in total, LED share 21.90%.
Caveat
No claim-specific caveat recorded

Sources carrying this claim

  1. Tartu Energia 2030, the city's energy and climate plan (operator)
Claim 5 clm-84fd65008470aafb quantitative
A single procurement in December 2022 then bought the rest of the conversion, 7,255 luminaires for 2.56 million euros
Published field
snippet · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
Verbatim: 'Kokku vahetatakse välja 7255 valgustit, millega saab uuendatud enamik Tartu tänavavalgustusest. Tööde kogumaksumus on 2 561 261 eurot.' The release of 7 December 2022 names the three lots (2,100, 2,125 and 3,030 luminaires) and the winning contractors Enersense AS and Leonhard Weiss OÜ with Kagu Elekter OÜ.
Caveat
The prose rounds the contract total of 2,561,261 euros to 2.56 million. 'The rest of the conversion' is the release's own framing ('enamik Tartu tänavavalgustusest' — most of Tartu's street lighting); completion of the works was not separately announced in any source reachable for this review.

Sources carrying this claim

  1. City of Tartu, news release on the citywide LED replacement procurement
Claim 6 clm-875ea4ca7d33091b quantitative
a target of roughly 90 per cent LED by the end of 2023
Published field
snippet · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
Deputy mayor Raimond Tamm, quoted in the 7 December 2022 release: 'Kui tänaseks on Tartu tänavavalgustitest ligikaudu kolmandik LED-valgustid, siis järgmise aasta lõpuks nende osakaal juba ligikaudu 90%.' 'The following year' from December 2022 is 2023.
Caveat
This is the operator's stated target at contract award, not a measured completion figure; no source reachable for this review states the share actually achieved.

Sources carrying this claim

  1. City of Tartu, news release on the citywide LED replacement procurement
Claim 7 clm-e2732ad10924e1d0 quantitative
street-lighting consumption falling only from 7,456 to 6,810 MWh a year
Published field
impact · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
Table 5.11: annual energy consumption 7,456 MWh in 2010 and 6,810 MWh in 2019. The city page states the 2010 figure as 7.456 GWh in Estonian decimal notation.
Caveat
No claim-specific caveat recorded

Sources carrying this claim

  1. Tartu Energia 2030, the city's energy and climate plan (operator)
Claim 8 clm-b95b80b04caf0940 quantitative
the network grew from 11,500 to 14,004 light points while consumption per point fell from 648 to 486 kWh
Published field
impact · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
Table 5.11: 11,500 light points in 2010 at 648 kWh per point; 14,004 in 2019 at 486 kWh per point. The 2019 total includes 346 points in the former Tähtvere parish merged into the city in 2017.
Caveat
The 2017 municipal merger accounts for 346 of the added points; the rest is new streets.

Sources carrying this claim

  1. Tartu Energia 2030, the city's energy and climate plan (operator)
Claim 9 clm-fc79d439a647bb36 descriptive
the city itself wrote that the early LED swaps barely moved the total because new streets kept being added
Published field
impact · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
Verbatim: 'Uute LED-valgustite kasutuselevõtt ei ole energiatarbimist tänavavalgustuses oluliselt vähendanud ja seda peamiselt põhjusel, et aja jooksul on lisandunud mitu uut tänavat (näiteks Idaringtee) ning sellega seoses on kasvanud ka valgustite arv.' — the adoption of new LED luminaires has not significantly reduced consumption, mainly because several new streets (for example the eastern ring road) were added and the number of luminaires grew.
Caveat
The sentence compares 2010 with 2014 (a fall of only 95 MWh); the 2019 row of the climate plan shows the total moving more once the LED share passed a fifth.

Sources carrying this claim

  1. City of Tartu, street lighting page (operator)
Claim 10 clm-a28397d63e2d5422 quantitative
the city projected electricity savings of about 400,000 euros a year
Published field
impact · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
Verbatim: 'Tänavavalgustuse LED-tehnoloogiale viimine toob linnale märgatava rahalise kokkuhoiu - oodatav elektrikulude kokkuhoid on ligi 400 000 eurot aastas.'
Caveat
An expectation stated at contract award in December 2022, at that winter's electricity prices; no source states the saving realised.

Sources carrying this claim

  1. City of Tartu, news release on the citywide LED replacement procurement
Claim 11 clm-81adc6589a188ac4 quantitative
the lighting electricity line it budgets stood at 1.3 million euros in the 2024 plan and 700,000 euros in the 2026 plan
Published field
impact · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
2024 memorandum: 'Suurim kulu põhitegevuse eelarves, 1,3 miljonit eurot, on linna valgustite, bussitabloode, parkimisautomaatide ja jalgrattaparklate elektrikulu.' 2026 memorandum: the same line item at 700,000 euros — 'valgustite, bussitabloode, parkimisautomaatide ja jalgrattaparklate elektrikulu 700 tuhat eurot'.
Caveat
Budget plans, not metered consumption, and the line item bundles bus displays, parking machines and bicycle shelters with the lights; falling electricity prices after 2022-23 contributed alongside the LED conversion, so the gap is not a pure LED measurement.

Sources carrying this claim

  1. Explanatory memorandum to Tartu's 2024 city budget (operator)
  2. Explanatory memorandum to Tartu's 2026 city budget (operator)
Claim 12 clm-ad321c13a0cc5684 descriptive
years of swaps left the total almost unchanged
Published field
lesson · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
The city page records a fall of only 95 MWh between 2010 and 2014 despite the first LED installations — 'Tarbimine on vähenenud minimaalselt ehk ainult 95 MWh võrra' — and Table 5.11 shows 7,456 MWh in 2010 against 7,100 MWh as late as 2017.
Caveat
No claim-specific caveat recorded

Sources carrying this claim

  1. City of Tartu, street lighting page (operator)
  2. Tartu Energia 2030, the city's energy and climate plan (operator)
Claim 13 clm-32de5a5bdd949619 quantitative
The plan's own milestone of about 68 per cent LED by the end of 2020 was still at about a third in December 2022
Published field
lesson · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
The plan on the city page: 'Asenduskava alusel peaks 2020. aasta lõpuks olema täielikult LED-valgustitega valgustatud viis piirkonda üheksast. Viie aasta jooksul asendatavate valgustite arv on umbes 7200 ehk 68% kõigist Tartu linna valgustitest.' The December 2022 release quotes the deputy mayor that about a third of the luminaires were LED at that point ('ligikaudu kolmandik LED-valgustid').
Caveat
The 68 per cent figure was the five-year replacement volume of the plan, expressed against the then-current stock; the comparison across the two sources is between a plan milestone and a stated interim share, not two measurements of the same inventory.

Sources carrying this claim

  1. City of Tartu, street lighting page (operator)
  2. City of Tartu, news release on the citywide LED replacement procurement
Claim 14 clm-6f030235f01187ce descriptive
per-luminaire radio control reached the centre pilot and the busier streets
Published field
lesson · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
The city page: 'Tihedama liiklusega tänavatel on vahetatud välja ligi 1500 valgustit (10–11% tänavavalgustite üldarvust) ja üle poole neist on raadio teel juhitavad LED-valgustid' — close to 1,500 luminaires replaced on busier streets, over half of them radio-controlled. The Tark Tartu report covers the 320-luminaire centre pilot with controllers in every fixture.
Caveat
The extent of per-luminaire control is stated as of the page's December 2020 revision; whether the 7,255 luminaires of the 2022-23 replacement carry individual controllers is not stated in any source reachable for this review.

Sources carrying this claim

  1. City of Tartu, street lighting page (operator)
  2. Tark Tartu, the city's smart-city portal, on the completed pilot installation
Claim 15 clm-bce218bdea2c0dda descriptive
remote control and cabinet telemetry stay in the budget as standing lines
Published field
lesson · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
The 2026 memorandum budgets 52,000 euros for 'tänavavalgustuse kaugjuhtimine ja kaamerate andmeside' (street lighting remote control and camera data links) among the activity's main operating costs, and both the 2024 and 2026 memoranda carry an annual investment line for replacing lighting control cabinets and telemetry systems (50,000 euros each year).
Caveat
The budget lines do not name the control system's vendor; the 52,000-euro line bundles camera data links with lighting remote control.

Sources carrying this claim

  1. Explanatory memorandum to Tartu's 2026 city budget (operator)
  2. Explanatory memorandum to Tartu's 2024 city budget (operator)

Source dossiers and revision state

This layer records what is known about each source, what is still missing, and the exact snapshot this page is rendering. A missing date, archive or hash stays visible as missing.

unreviewed Revision 2026-08-28-tartu-baseline effective 2026-08-28 · created 2026-08-28

Awaiting operator and domain-expert review; publication of this revision implies neither.

sha256:da17596b6a3e5bfc237b0c58ebdf1be23a0c8c67012373fa680bb0aed63a068b
Revision history → Permanent version link → Machine-readable record → Evidence Constitution →
15
of 15 claims mapped
10
source dossiers
5
publication dates recorded
0
archives linked
0
exact locators
0
content captures hashed

Governance facts carried by the record

Operator
Tartu city government (linnamajanduse osakond); network maintenance contracted to EST Networks OÜ under a 2022 contract running to the end of 2025
Actor types
city-government
Funding model
mixed
Funding description
City budget; Environmental Investment Centre (KIK) grants for district reconstructions; EU Horizon 2020 for the SmartEnCity pilot
Cost
≈€2.56M for the 2022 mass replacement contract alone; the 2017 centre pilot cost €112,452
Ownership
Not recorded
Decision rights
Not recorded
Exit conditions
Not recorded

10 source dossiers

City of Tartu, street lighting page (operator) tartu.ee · 6 linked claims

Open original source ↗

Stable source ID
src-76e0b801f4ba818e
Publisher
Name not classified · tartu.ee
Type / language
web-page · language not classified
Published
Not recorded
Updated
2020-12-07
Source last checked
No source-level check date
Record last verified
2026-08-28
Dossier created
2026-08-28
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

The operator's own street lighting page, largely written in the plan era and last modified 7 December 2020. Carries the 2014 inventory (321 km of lit streets, 11,547 lamps, 151 control cabinets, 10,620 HPS, 295 HID and 632 LED), the 2010 and 2014 consumption (7.456 and 7.361 GWh) with the city's own statement that new LED lights had not significantly cut consumption because new streets were added, the 2015 replacement plan (600 lamps replaced in 2015, nine districts over nine years, a calculated 70 per cent saving per swap, about 7,200 lamps or 68 per cent to be LED by the end of 2020), and the statement that close to 1,500 luminaires on busier streets had been replaced, over half of them radio-controlled LEDs.

Descriptive only — not page/paragraph exact
Claims linked
Tartu Energia 2030, the city's energy and climate plan (operator) tartu.ee · 5 linked claims

Open original source ↗

Stable source ID
src-38c9bdeadd8caf6e
Publisher
Name not classified · tartu.ee
Type / language
pdf · language not classified
Published
Not recorded
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-08-28
Dossier created
2026-08-28
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

The city's energy and climate plan (SECAP), cover dated Tartu 2021. Table 5.11 is the measured series: 2010 — 11,500 light points, 7,456 MWh, 648 kWh per point; 2014 — 632 LED of 11,547, 5.50%, 7,361 MWh, 637 kWh; 2017 — 1,550 LED of 12,792, 12.10%, 7,100 MWh, 531 kWh; 2019 — 3,062 LED of 14,004, 21.90%, 6,810 MWh, 486 kWh per point.

Descriptive only — not page/paragraph exact
Claims linked
City of Tartu, news release on the citywide LED replacement procurement tartu.ee · 4 linked claims

Open original source ↗

Stable source ID
src-51e839b42ea707eb
Publisher
Name not classified · tartu.ee
Type / language
web-page · language not classified
Published
2022-12-07
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-08-28
Dossier created
2026-08-28
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

City news release of 7 December 2022. The government accepted bids by Enersense AS (lots I and III) and a joint bid by Leonhard Weiss OÜ and Kagu Elekter OÜ (lot II) to replace 7,255 high-pressure sodium luminaires in three lots for a contract total of 2,561,261 euros. Deputy mayor Raimond Tamm is quoted that about a third of Tartu's street lights were LED at the time and the share would be roughly 90 per cent by the end of the following year; expected electricity savings are put at close to 400,000 euros a year.

Descriptive only — not page/paragraph exact
Claims linked
City of Tartu, news release on the SmartEnCity centre-city lighting procurement tartu.ee · 1 linked claim

Open original source ↗

Stable source ID
src-8de048efc139340e
Publisher
Name not classified · tartu.ee
Type / language
web-page · language not classified
Published
2017-07-06
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-08-28
Dossier created
2026-08-28
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

City news release of 6 July 2017 on the SmartEnCity pilot procurement: Leonhard Weiss Energy AS won with 112,452 euros; 320 sodium lights in the city centre replaced with LED; the pilot streets are listed; Cityntel OÜ to install management controllers in all fixtures for remote switching and dimming, with traffic and environmental sensors to be integrated; 70,000 euros from the city budget, the rest from European Commission support.

Descriptive only — not page/paragraph exact
Claims linked
Tark Tartu, the city's smart-city portal, on the completed pilot installation tarktartu.ee · 2 linked claims

Open original source ↗

Stable source ID
src-e594a917c8c176c8
Publisher
Name not classified · tarktartu.ee
Type / language
web-page · language not classified
Published
2018-01-08
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-08-28
Dossier created
2026-08-28
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

The city's smart-city portal, 8 January 2018, reporting the pilot delivered: 320 sodium luminaires replaced in the centre, Cityntel OÜ controllers installed in all of them for remote on-off, dimming and performance monitoring, works by Leonhard Weiss Energy AS for 112,452 euros, financed partly from the city budget and partly by European Commission support.

Descriptive only — not page/paragraph exact
Claims linked
City of Tartu, news from the city government session of 22 October 2024 tartu.ee · background

Open original source ↗

Stable source ID
src-c7fc4b73beebb335
Publisher
Name not classified · tartu.ee
Type / language
web-page · language not classified
Published
2024-10-22
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-08-28
Dossier created
2026-08-28
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

City government session notes, 22 October 2024: street lighting network maintenance is performed by EST Networks OÜ under a contract signed in 2022 and ending 31 December 2025, and the city sought council permission to procure operation, maintenance and repair of its electrical network for 2026-2030.

Descriptive only — not page/paragraph exact
Claims linked
Background source; no baseline claim points here
Explanatory memorandum to Tartu's 2024 city budget (operator) tartu.ee · 2 linked claims

Open original source ↗

Stable source ID
src-38c7c5976a314f9c
Publisher
Name not classified · tartu.ee
Type / language
pdf · language not classified
Published
Not recorded
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-08-28
Dossier created
2026-08-28
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

Explanatory memorandum to the 2024 city budget. States that the 2023 investment volume in housing and communal services was unusually large because of the LED luminaire replacement, plans 1.3 million euros for the electricity of city lights, bus displays, parking machines and bicycle shelters, and 50,000 euros for replacing lighting control cabinets and telemetry systems. The document states no publication date of its own.

Descriptive only — not page/paragraph exact
Claims linked
Explanatory memorandum to Tartu's 2026 city budget (operator) tartu.ee · 2 linked claims

Open original source ↗

Stable source ID
src-b6ec366c8d10c060
Publisher
Name not classified · tartu.ee
Type / language
pdf · language not classified
Published
Not recorded
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-08-28
Dossier created
2026-08-28
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

Explanatory memorandum to the 2026 city budget. The lighting electricity line is planned at 700,000 euros, maintenance at 418,000 and repair at 300,000 euros, and 52,000 euros are budgeted for street lighting remote control and camera data links; investment falls back to 476,000 euros of routine cable, mast, cabinet and telemetry work. Its expenditure table records 2024 actual operating costs of 1,604,145 euros and 2024 actual investment of 1,457,078 euros for the lighting activity. The document states no publication date of its own.

Descriptive only — not page/paragraph exact
Claims linked
Tartu Postimees, on continuing the street lighting renovation (media) tartu.postimees.ee · background

Open original source ↗

Stable source ID
src-39556ca1de5b5558
Publisher
Name not classified · tartu.postimees.ee
Type / language
web-page · language not classified
Published
2021-04-10
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-08-28
Dossier created
2026-08-28
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

Regional daily, 10 April 2021: the goal is citywide LED conversion; the Annelinn reconstruction begun in 2020 covered close to a thousand luminaires; further district packages (567 luminaires plus several areas) were funded with support from the Environmental Investment Centre (KIK) after the Annelinn works came in under budget.

Descriptive only — not page/paragraph exact
Claims linked
Background source; no baseline claim points here
SmartEnCity project, solution factsheet 'LED lights with smart controllers (Tartu)' smartencity.eu · 1 linked claim

Open original source ↗

Stable source ID
src-d1d0b564373ec1e4
Publisher
Name not classified · smartencity.eu
Type / language
web-page · language not classified
Published
Not recorded
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-08-28
Dossier created
2026-08-28
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

The Horizon 2020 consortium's own factsheet on the Tartu lighting action. The site refuses automated reading from this environment (HTTP 503 via proxy, connection reset directly), so no passage was read on the page itself; search results quote it recording 322 streetlight controllers produced by project partner Cityntel OÜ and installed into luminaires by the luminaire producer Vizulo. Used only as corroboration of the pilot's consortium attribution.

Descriptive only — not page/paragraph exact
Claims linked
Known limits of this passport
  • Publisher names and source languages have not yet been classified; domains are recorded without guessing.
  • Existing source notes are descriptive locators, not page- or paragraph-exact citations.
  • A missing archive, publication date or content hash is shown as null rather than inferred.
  • The project-level evidence grade ranks the strongest source in the entry; it is not a truth score for every claim.