1001 Smart Cities
🇦🇹 Vienna

LED it Shine: Citywide Smart Street Lighting Retrofit

🤖 AI-generated summary of the sources below · 🔎 Last verified · ◆ 11 sourced claims, none individually verified yet

This overview was generated with AI from the public sources listed below and checked against them before publication. It has not had a complete human fact-check — treat it as a starting point and follow the sources.

How this atlas is made · What “last verified” means · What “source-checked” means · The full record behind this page

Vienna's LED it shine retrofit dims streetlights on preconfigured night schedules; the luminaire manufacturer says the fixtures run on a city lighting-management system and are built to add vehicle or pedestrian sensors later, which none of the city's own pages repeats. The 60,000-fixture catenary phase finished in 2020; by October 2025, 108,000+ of ~133,000 streetlights (over 80%) were LED, with mast-mounted lights due by end 2026 and ~3,500 heritage fixtures by 2028.

Live 📅 since 2017
Outcome🔄 Ongoing
Evidence🏛️ Official
what does this mean?The strongest source is the operator's or the city's own reporting — an official report, dataset or press release. It grades who did the looking — not how well the project went. All four grades →
Run byCity of Vienna (Stadt Wien)
Scale🏙️ City-wide

📊 Impact

City pages state modern LED fixtures cut per-fixture energy use 'over 50%'; Austrian press (heute.at, Oct 2025) cites 'more than 60%' plus roughly 1,000 tons of CO2 avoided per year; the luminaire manufacturer Schréder claims 65% program-wide savings. Figures are self-reported by the city/operator or vendor — not independently audited.

⚡ EnergySmart lighting

Sources

↗ Smart City Wien — LED it shine (authority)Published 3 April 2016 · updated 22 October 2020Program overview: two-phase catenary/pole-mounted rollout, driver-based scheduled dimming, sensor-ready luminaire design.
↗ Stadt Wien — Tausch der Straßenbeleuchtung (authority)Updated 11 May 2026Official rollout timeline: catenary lights swapped 2017-2020; mast-mounted target 2027; heritage-style fixtures target 2028.
↗ Stadt Wien — Zahlen und Daten zur Wiener Straßenbeleuchtung (authority)Updated 10 July 2026Citywide lighting inventory: ~160,000 fixtures, 94,500 poles, ~2,800km of lit streets.
↗ Stadt Wien — LED-Technik in der öffentlichen Beleuchtung (authority)Updated 23 September 2025Confirms driver-integrated dimming and part-night dimming schedule.
↗ Heute.at — Fertigstellung Ende 2026 (established Austrian press, 31 Oct 2025)108,000+ of ~133,000 streetlights (81%) converted as of Oct 2025; cites >60% electricity-use cut and ~1,000t CO2/year avoided.
Show 1 more sourcesShow fewer
↗ Schréder (vendor/trade press)Luminaire manufacturer case study: 160,000-fixture program, preconfigured dimming scenarios, sensor-ready luminaires.
Show your work What this page rests on and what it can’t tell you · all 11 claims with their sources · the forensic record

Evidence Passport · public beta 11 addressable claims, 6 source dossiers, one permanent baseline. The passport is unreviewed — an AI-assisted structural migration, not a human or expert endorsement. Every revision keeps a permanent copy under revision history.

Inspect the claims, one by one — verbatim text, sources and caveats for all 11

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-40f7591f097dfbec descriptive
Vienna's LED it shine retrofit dims streetlights on preconfigured night schedules
Published field
snippet · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
The luminaire manufacturer's case study on the Vienna programme states that the Vienna Round luminaire "integrates a driver that is compatible with the city's own management system. The lighting is dimmed according to preconfigured scenarios to reduce energy consumption while guaranteeing visibility during the night." The city's own technical page independently confirms that scheduled night dimming is in use, listing among the advantages of the technology a "Halbnachtschaltung zur Anpassung des Helligkeitsniveaus in den Nachtstunden durch Dimmung" (part-night switching that adjusts brightness during the night hours by dimming) and noting that LED degradation "kann durch die Software in modernen Treibern gut kompensiert werden" (can be compensated by the software in modern drivers).
Caveat
Only the manufacturer's case study mentions a central lighting-management system; none of the four City of Vienna pages names one. What the city itself describes is a dimming schedule set in the luminaire's driver, which needs no central control link. The programme name "LED it shine" is used by both the city and the manufacturer.

Sources carrying this claim

  1. Schréder (vendor/trade press)
  2. Stadt Wien — LED-Technik in der öffentlichen Beleuchtung (authority)
Claim 2 clm-578ed916611c57da descriptive
are built to add vehicle or pedestrian sensors later
Published field
snippet · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
The manufacturer's case study states that the luminaire "has also been developed to integrate sensors that detect vehicles and people so that the lighting can be automatically adapted to what is really needed."
Caveat
This describes a design capability, not an installation: no source says any sensor has been fitted in Vienna, and no City of Vienna page mentions vehicle or pedestrian detection at all. The statement comes from the company that sells the luminaire.

Sources carrying this claim

  1. Schréder (vendor/trade press)
Claim 3 clm-be81445f73225523 quantitative
The 60,000-fixture catenary phase
Published field
snippet · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
The manufacturer's case study says the first phase "involved installing around 60,000 catenary fixtures". The city itself gives a lower figure: its technical page states "Seit 2017 wurden rund 50.000 LED-Seilhängeleuchten in der ganzen Stadt eingesetzt" (since 2017 around 50,000 LED catenary luminaires have been installed across the city), and the city's 2016 programme page had announced "By the end of 2020, 50,000 catenary luminaires across the city will have been converted to LED." The operator's own count is therefore about a sixth lower than the supplier's.
Caveat
No claim-specific caveat recorded

Sources carrying this claim

  1. Schréder (vendor/trade press)
Claim 4 clm-34a0c0e7cfbadead quantitative
finished in 2020
Published field
snippet · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
The city's rollout page states: "Von 2017 bis 2020 wurden die alten Seilhängeleuchten gegen effiziente LED-Leuchten getauscht" (from 2017 to 2020 the old catenary luminaires were exchanged for efficient LED luminaires).
Caveat
No claim-specific caveat recorded

Sources carrying this claim

  1. Stadt Wien — Tausch der Straßenbeleuchtung (authority)
Claim 5 clm-01e5e5200c3d9081 quantitative
by October 2025, 108,000+ of ~133,000 streetlights
Published field
snippet · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
The Austrian daily reported on 31 October 2025: "Schon mehr als 108.000 der insgesamt rund 133.000 Straßenleuchten wurden auf moderne LED-Technik umgerüstet" (more than 108,000 of the roughly 133,000 street lights in total have already been converted to modern LED technology).
Caveat
The denominator is the newspaper's, and it is not the figure the city publishes: the City of Vienna's own inventory page counts about 160,000 lighting fixtures, a wider category than street lights alone. The manufacturer's case study also describes the programme as covering 160,000 fixtures.

Sources carrying this claim

  1. Heute.at — Fertigstellung Ende 2026 (established Austrian press, 31 Oct 2025)
Claim 6 clm-77701604fd0acef9 quantitative
with mast-mounted lights due by end 2026
Published field
snippet · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
The newspaper states "Bis Ende 2026 sollen alle Mastleuchten auf LED umgerüstet sein" (all mast lights are to be converted to LED by the end of 2026). The city's own rollout page names a later target for the same work: "Bis 2027 werden die Mastansatzleuchten ausgetauscht" (the mast-mounted luminaires will be exchanged by 2027). The two dates published on the same programme differ by a year.
Caveat
No claim-specific caveat recorded

Sources carrying this claim

  1. Heute.at — Fertigstellung Ende 2026 (established Austrian press, 31 Oct 2025)
Claim 7 clm-0a52d952f6037dda quantitative
and ~3,500 heritage fixtures by 2028
Published field
snippet · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
The newspaper gives the count and the date: "Dann bleiben noch etwa 3.500 Vintageleuchten, die bis 2028 ebenfalls mit den Wiener Standardeinsätzen ausgerüstet werden" (about 3,500 vintage luminaires will then remain, which will likewise be fitted with the Viennese standard inserts by 2028). The city's rollout page confirms the deadline without a count: "Bis 2028 werden auch jenen Leuchten getauscht, bei denen das historische Erscheinungsbild in Schutzzonen und Altstadtbereichen erhalten bleiben soll" (by 2028 those luminaires will also be exchanged whose historic appearance is to be preserved in protected zones and old-town areas).
Caveat
The count of about 3,500 appears only in the newspaper; the city names the 2028 deadline but publishes no number for these fixtures.

Sources carrying this claim

  1. Heute.at — Fertigstellung Ende 2026 (established Austrian press, 31 Oct 2025)
  2. Stadt Wien — Tausch der Straßenbeleuchtung (authority)
Claim 8 clm-ad83b1eb38dd8e79 quantitative
City pages state modern LED fixtures cut per-fixture energy use 'over 50%'
Published field
impact · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
The city's rollout page states: "Moderne LED-Leuchten verbrauchen über 50 Prozent weniger Energie als alte, konventionelle Modelle" (modern LED luminaires consume over 50 per cent less energy than old, conventional models). The comparison is explicitly fixture against fixture.
Caveat
The page names no measurement, no baseline year and no old fixture type against which the comparison was made, and it does not say what the figure means for the city's total lighting bill.

Sources carrying this claim

  1. Stadt Wien — Tausch der Straßenbeleuchtung (authority)
Claim 9 clm-61036b4ba667a87e quantitative
Austrian press (heute.at, Oct 2025) cites 'more than 60%'
Published field
impact · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
The newspaper writes: "Mehr als 60 Prozent des bisherigen Stromverbrauchs fallen durch die LED-Leuchten weg" (more than 60 per cent of the previous electricity consumption is eliminated by the LED luminaires).
Caveat
The paper states the figure flatly, without naming who measured it or what period it covers, and it refers to total electricity use rather than the per-fixture comparison the city publishes. The article carries quotes from the planning councillor and the head of the municipal lighting department, so the number reads as the city's own.

Sources carrying this claim

  1. Heute.at — Fertigstellung Ende 2026 (established Austrian press, 31 Oct 2025)
Claim 10 clm-114d4a8632660e7c quantitative
plus roughly 1,000 tons of CO2 avoided per year
Published field
impact · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
The same article states: "Durch den Umstieg spart Wien jedes Jahr rund 1.000 Tonnen CO2" (through the switch Vienna saves around 1,000 tonnes of CO2 every year), illustrating it with a comparison to more than 800 one-way flights from Vienna to New York.
Caveat
The newspaper gives no emission factor, no baseline and no source for the calculation, and no City of Vienna page reached from this entry publishes the figure.

Sources carrying this claim

  1. Heute.at — Fertigstellung Ende 2026 (established Austrian press, 31 Oct 2025)
Claim 11 clm-3e734d217997299f quantitative
the luminaire manufacturer Schréder claims 65% program-wide savings
Published field
impact · verbatim
Mapping
mapped · no interpretation or interpolation added by this passport
What the mapping says
The manufacturer's case study states, immediately after describing the preconfigured dimming scenarios: "Indeed, the city has managed to reduce its energy consumption by 65%."
Caveat
The sentence names no baseline, no period and no measurement, and it says "its energy consumption" without stating that only lighting is meant. It appears in a marketing case study by the company that supplied the luminaires, and it is the highest of the three savings figures in this entry.

Sources carrying this claim

  1. Schréder (vendor/trade press)
Forensic record — source dossiers, gaps, hashes and the exact revision this page renders

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 2026-08-22-evidence-baseline effective 2026-07-22 · created 2026-08-22

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

sha256:1eeb1133afc530655df0f70c1f1160d066a7e806a9f3cff0d77a0b16bc9627d3
Revision history → Permanent version link → Machine-readable record → Evidence Constitution →
11
of 11 claims mapped
6
source dossiers
2
publication dates recorded
0
archives linked
0
exact locators
0
content captures hashed

Governance facts carried by the record

Operator
City of Vienna (Stadt Wien)
Actor types
city-government
Funding model
public
Funding description
Not recorded
Cost
Not recorded
Ownership
Not recorded
Decision rights
Not recorded
Exit conditions
Not recorded

6 source dossiers

Smart City Wien — LED it shine (authority) smartcity.wien.gv.at · background

Open original source ↗

Stable source ID
src-90ab3ff64503874c
Publisher
Name not classified · smartcity.wien.gv.at
Type / language
web-page · language not classified
Published
2016-04-03
Updated
2020-10-22
Source last checked
No source-level check date
Record last verified
2026-07-22
Dossier created
2026-08-22
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

Program overview: two-phase catenary/pole-mounted rollout, driver-based scheduled dimming, sensor-ready luminaire design.

Descriptive only — not page/paragraph exact
Claims linked
Background source; no baseline claim points here
Stadt Wien — Tausch der Straßenbeleuchtung (authority) wien.gv.at · 3 linked claims

Open original source ↗

Stable source ID
src-f60ded0eb8ebdcc3
Publisher
Name not classified · wien.gv.at
Type / language
web-page · language not classified
Published
Not recorded
Updated
2026-05-11
Source last checked
No source-level check date
Record last verified
2026-07-22
Dossier created
2026-08-22
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

Official rollout timeline: catenary lights swapped 2017-2020; mast-mounted target 2027; heritage-style fixtures target 2028.

Descriptive only — not page/paragraph exact
Claims linked
Stadt Wien — Zahlen und Daten zur Wiener Straßenbeleuchtung (authority) wien.gv.at · background

Open original source ↗

Stable source ID
src-ee9304a40555e022
Publisher
Name not classified · wien.gv.at
Type / language
web-page · language not classified
Published
Not recorded
Updated
2026-07-10
Source last checked
No source-level check date
Record last verified
2026-07-22
Dossier created
2026-08-22
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

Citywide lighting inventory: ~160,000 fixtures, 94,500 poles, ~2,800km of lit streets.

Descriptive only — not page/paragraph exact
Claims linked
Background source; no baseline claim points here
Stadt Wien — LED-Technik in der öffentlichen Beleuchtung (authority) wien.gv.at · 1 linked claim

Open original source ↗

Stable source ID
src-ea5239b39d0cb96d
Publisher
Name not classified · wien.gv.at
Type / language
web-page · language not classified
Published
Not recorded
Updated
2025-09-23
Source last checked
No source-level check date
Record last verified
2026-07-22
Dossier created
2026-08-22
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

Confirms driver-integrated dimming and part-night dimming schedule.

Descriptive only — not page/paragraph exact
Claims linked
Heute.at — Fertigstellung Ende 2026 (established Austrian press, 31 Oct 2025) heute.at · 5 linked claims

Open original source ↗

Stable source ID
src-236cd97fd9b412a7
Publisher
Name not classified · heute.at
Type / language
web-page · language not classified
Published
2025-10-31
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-07-22
Dossier created
2026-08-22
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

108,000+ of ~133,000 streetlights (81%) converted as of Oct 2025; cites >60% electricity-use cut and ~1,000t CO2/year avoided.

Descriptive only — not page/paragraph exact
Claims linked
Schréder (vendor/trade press) schreder.com · 4 linked claims

Open original source ↗

Stable source ID
src-402bf635e776a9f2
Publisher
Name not classified · schreder.com
Type / language
web-page · language not classified
Published
Not recorded
Updated
Not recorded
Source last checked
No source-level check date
Record last verified
2026-07-22
Dossier created
2026-08-22
Retrieved copy
No local capture recorded
Archive
No archived copy linked
Content hash
No captured content hash
Locator
Open the recorded source note

Luminaire manufacturer case study: 160,000-fixture program, preconfigured dimming scenarios, sensor-ready luminaires.

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.

Continue exploring

Compare this project

🇺🇸 District Smart Lighting P3 Modernization · Washington D.C. Ownership contrast: DC financed its LED retrofit via a PPP with networked monitoring; Vienna's is city-run, dimming only. 🇦🇺 Smart PE-Cell LED Street Lighting Network · Melbourne Melbourne's retrofit is a close peer: utility-partnered smart PE-cell LEDs since 2018, switching by light level not schedule. 🇻🇳 HAPULICO Remote Street Lighting Control Network · Hanoi Both city-run LED retrofits with remote control, a decade apart: Vienna dims on schedule since 2017, Hanoi by radio since 2012.

Who owns the lamppost?

Every city in this group swapped its street lighting for LEDs and put a management system behind it. The difference is who paid, who operates it and for how long — a choice that outlives the lamps.

ProjectSinceStatusOutcomeEvidenceRun byCostWho built and runs it
Ilumina SP Centralized LED Mesh RetrofitSão Paulo, 🇧🇷 2019 Live Succeeded Official Private company not public A public-private partnership: the concessionaire replaced the stock ahead of contract and now runs it, covering about 90 per cent of the city's lighting.
District Smart Lighting P3 ModernizationWashington D.C., 🇺🇸 2022 In build Ongoing Media Private company, City government $309M over 15 years A fifteen-year P3 that officials call the country's largest, adding a public wifi layer to the poles as it goes.
Milan Citywide LED Public Lighting RetrofitMilan, 🇮🇹 2014 Live Succeeded Official Utility or public operator not public The municipal utility did it in-house and in eighteen months, timed to an expo rather than to a contract.
LED it Shine: Citywide Smart Street Lighting RetrofitVienna, 🇦🇹 2017 Live Ongoing Official City government not public The city runs its own lighting-management system and dims on schedule, with luminaires built to take sensors later.

Explore the wider context

💡 Smart lighting guide🏙️ Vienna city profile⚡ Energy projects📖 Public-private partnership (PPP)
📎 Cite this project

1001 Smart Cities (2026). “LED it Shine: Citywide Smart Street Lighting Retrofit” — Vienna, Austria. The Smart City Atlas. https://1001smartcities.org/projects/vienna-led-smart-lighting/ (last verified 2026-07-22). Data: CC BY 4.0.

The underlying data is free to reuse with attribution — see the open data page.

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