{
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 "createdAt": "2026-08-12T00:00:00Z",
 "description": "Append-only Evidence Passport records. Old revisions are immutable; corrections create a new revision and preserve the previous permalink.",
 "entity": {
  "type": "project",
  "id": "tallinn-smart-street-lighting",
  "title": "Tallinn LED & Smart Street Lighting",
  "canonicalUrl": "https://1001smartcities.org/projects/tallinn-smart-street-lighting/"
 },
 "currentRevisionId": "2026-08-22-evidence-baseline",
 "revisions": [
  {
   "id": "2026-08-22-evidence-baseline",
   "createdAt": "2026-08-22T18:08:00Z",
   "effectiveAt": "2026-07-25",
   "changeType": "baseline",
   "summary": "Created the first structured Evidence Passport with 8 claims and 4 source dossiers.",
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   },
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    "status": "unreviewed",
    "by": null,
    "date": null,
    "note": "Awaiting operator and domain-expert review; publication of this revision implies neither."
   },
   "changes": [
    {
     "operation": "add",
     "path": "/evidencePassport",
     "summary": "Added claim-level evidence mapping and source dossiers."
    },
    {
     "operation": "add",
     "path": "/revisionHistory",
     "summary": "Established a permanent, hash-addressed baseline revision."
    }
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   "snapshotHash": "sha256:8440ab6de04ff1cfe7907f93e66e82b21b7497857ff0e495fea043aa7f7f9b39",
   "snapshot": {
    "asOf": "2026-07-25",
    "projectFingerprint": "sha256:2e711ed4cc81067c199e122048621068f27ee973f2cbf734045afcb9f3d81aa1",
    "assurance": {
     "status": "unreviewed",
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      "schema",
      "publication-diff-contract",
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      "claim-text-drift",
      "source-reference-resolution",
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     ]
    },
    "projectState": {
     "status": "live",
     "outcome": "ongoing",
     "evidenceGrade": "official",
     "timeline": {
      "started": 2014,
      "ended": null
     }
    },
    "governance": {
     "operator": "City of Tallinn",
     "actorTypes": [
      "city-government"
     ],
     "fundingModel": "public",
     "fundingDescription": null,
     "cost": null,
     "ownership": null,
     "decisionRights": null,
     "exitConditions": null
    },
    "claims": [
     {
      "id": "clm-66ada69e3440c924",
      "field": "snippet",
      "text": "Tallinn has been converting its street lighting to LEDs since 2014",
      "statementKind": "quantitative",
      "textMode": "verbatim-from-project-record",
      "mappingStatus": "mapped",
      "sourceRefs": [
       "src-f82ef185da9e73bb"
      ],
      "supportNote": "The city's own article states the LED rollout began in 2014: 'The widespread uptake of LED lamps in Tallinn started in 2014.'",
      "caveat": null,
      "interpretation": {
       "added": false,
       "interpolation": false,
       "note": "The passport copies the published claim and its recorded source mapping without adding a conclusion."
      }
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     {
      "id": "clm-516a00e92e7da361",
      "field": "snippet",
      "text": "by March 2026 about 64% of its roughly 72,700 luminaires were LED",
      "statementKind": "quantitative",
      "textMode": "verbatim-from-project-record",
      "mappingStatus": "mapped",
      "sourceRefs": [
       "src-7cc32f2ffaba5981"
      ],
      "supportNote": "The Estonian trade-press article (18 March 2026) states: 'Linnas on kokku 72 681 tanavavalgusti, millest 46 272 ehk umbes 64% on juba leedvalgustid' (there are 72,681 streetlights in the city, of which 46,272, or about 64%, are already LED).",
      "caveat": "This figure is reported by an Estonian trade-press outlet (Elektriala, partly paywalled), not by a City of Tallinn publication. The entry's parenthetical '(city figures)' at the end of the sentence implies a more direct city source than what is actually cited for this number.",
      "interpretation": {
       "added": false,
       "interpolation": false,
       "note": "The passport copies the published claim and its recorded source mapping without adding a conclusion."
      }
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     {
      "id": "clm-10ca1b4874a05bc1",
      "field": "snippet",
      "text": "the city put the saving at over 4,000 MWh a year versus 2019",
      "statementKind": "quantitative",
      "textMode": "verbatim-from-project-record",
      "mappingStatus": "mapped",
      "sourceRefs": [
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      "supportNote": "The city's own article (26 January 2022) states: 'The energy consumption has been reduced by more than 4,000 MWh compared to 2019.'",
      "caveat": "This savings figure is from the City of Tallinn's January 2022 article, which describes the city's 2021 status: 66,993 total luminaires, 25,386 LED (37.9% LED share) — far below the 64% figure the entry pairs it with for 2026. No source in this entry gives an updated MWh-savings figure for the higher 2026 LED share; Elektriala's 2026 article, which is the only source for the 64%/72,700 figures, reports no energy-savings number at all.",
      "interpretation": {
       "added": false,
       "interpolation": false,
       "note": "The passport copies the published claim and its recorded source mapping without adding a conclusion."
      }
     },
     {
      "id": "clm-d329ce5edf7b0267",
      "field": "snippet",
      "text": "adaptive Cityntel/Lumoflex controllers dim lights by weather and traffic",
      "statementKind": "descriptive",
      "textMode": "verbatim-from-project-record",
      "mappingStatus": "mapped",
      "sourceRefs": [
       "src-f878672917c1d6ce",
       "src-ae61132c8a5d7df2"
      ],
      "supportNote": "Invest Foresight (2 November 2017) quotes Cityntel's founder describing Old Town lights that are 'automatically adjusted depending on weather conditions and street traffic density.' Lumoflex's own case-study material (accessed via cached search results after the live page returned HTTP 503) states Cityntel has installed about 600 Lumoflex smart controllers in the Old Town/City Centre of Tallinn, running the Lumoflex City platform as the management system — confirming the vendor identity and location, though Lumoflex's own text describes dimming by 'ambient light conditions' rather than explicitly 'weather'.",
      "caveat": "This adaptive layer covers only about 600 of the city's roughly 72,700 luminaires (well under 1%) — a small Old Town/City Centre pilot, not a citywide system. 'Invest Foresight' is an investment/business-marketing publication, not independent journalism: the article is built around an interview with Cityntel's own founder, so it is effectively the vendor's self-description rather than a neutral evaluation.",
      "interpretation": {
       "added": false,
       "interpolation": false,
       "note": "The passport copies the published claim and its recorded source mapping without adding a conclusion."
      }
     },
     {
      "id": "clm-987085c7e2c5d968",
      "field": "snippet",
      "text": "with remote fault detection",
      "statementKind": "descriptive",
      "textMode": "verbatim-from-project-record",
      "mappingStatus": "mapped",
      "sourceRefs": [
       "src-f878672917c1d6ce"
      ],
      "supportNote": "Invest Foresight states the system 'monitors the health of lamp and reports back failures and statistics.'",
      "caveat": "Sourced only to Invest Foresight, an investment/business-marketing publication interviewing the vendor (Cityntel), not an independent evaluation.",
      "interpretation": {
       "added": false,
       "interpolation": false,
       "note": "The passport copies the published claim and its recorded source mapping without adding a conclusion."
      }
     },
     {
      "id": "clm-88ebda53db4fe848",
      "field": "snippet",
      "text": "A full citywide smart lighting management system is planned for the 2026-2030 period",
      "statementKind": "quantitative",
      "textMode": "verbatim-from-project-record",
      "mappingStatus": "mapped",
      "sourceRefs": [
       "src-7cc32f2ffaba5981"
      ],
      "supportNote": "The article (18 March 2026) describes plans to implement a 'sustainable and multifunctional urban lighting management system' during the 2026-2030 strategic period: 'rakendada jatkusuutlikku ja multifunktsionaalset linnavalgustuse juhtimissusteemi.' It is explicitly described as planned, not yet operational.",
      "caveat": "As of this source's publication (18 March 2026) and the entry's verification date (25 July 2026), the system remains at the planning stage; no source in this entry establishes whether implementation had begun by either date.",
      "interpretation": {
       "added": false,
       "interpolation": false,
       "note": "The passport copies the published claim and its recorded source mapping without adding a conclusion."
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     {
      "id": "clm-0c01bdfbf24b1a0d",
      "field": "impact",
      "text": "about 64% of roughly 72,700 luminaires converted by March 2026",
      "statementKind": "quantitative",
      "textMode": "verbatim-from-project-record",
      "mappingStatus": "mapped",
      "sourceRefs": [
       "src-7cc32f2ffaba5981"
      ],
      "supportNote": "The Estonian trade-press article (18 March 2026) reports 72,681 streetlights citywide, of which 46,272 (about 64%) are already LED.",
      "caveat": "This figure is from Elektriala trade press, not from a City of Tallinn publication, though the sentence attributes it to 'city figures.'",
      "interpretation": {
       "added": false,
       "interpolation": false,
       "note": "The passport copies the published claim and its recorded source mapping without adding a conclusion."
      }
     },
     {
      "id": "clm-f1a1f6a139650366",
      "field": "impact",
      "text": "over 4,000 MWh a year versus 2019",
      "statementKind": "quantitative",
      "textMode": "verbatim-from-project-record",
      "mappingStatus": "mapped",
      "sourceRefs": [
       "src-f82ef185da9e73bb"
      ],
      "supportNote": "The city's own article (26 January 2022) reports energy consumption reduced by more than 4,000 MWh compared with 2019.",
      "caveat": "This figure describes the city's 2021 status (37.9% LED share), not the 64% LED share this sentence attaches it to for 2026. No source gives an updated savings figure for the higher 2026 LED share.",
      "interpretation": {
       "added": false,
       "interpolation": false,
       "note": "The passport copies the published claim and its recorded source mapping without adding a conclusion."
      }
     }
    ],
    "sources": [
     {
      "id": "src-f82ef185da9e73bb",
      "title": "City of Tallinn — Tallinn deploys LED lights, saves hundreds of thousands yearly",
      "url": "https://www.tallinn.ee/en/news/tallinn-deploys-led-lights-saves-hundreds-thousands-yearly",
      "publisher": {
       "name": null,
       "domain": "tallinn.ee",
       "classification": "not-classified"
      },
      "sourceType": "web-page",
      "language": "und",
      "role": "claim-evidence",
      "claimRefs": [
       "clm-66ada69e3440c924",
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      ],
      "temporal": {
       "publishedAt": "2022-01-26",
       "updatedAt": null,
       "sourceCheckedAt": null,
       "recordLastVerifiedAt": "2026-07-25",
       "dossierCreatedAt": "2026-08-22",
       "retrievedAt": null,
       "status": "publication-and-record-dates-recorded"
      },
      "locator": {
       "type": "descriptive-source-note",
       "value": "Official primary: citywide LED rollout since 2014, LED share (25,386/66,993 in 2021), >4,000 MWh/yr saved vs 2019, hundreds of thousands € saved; evidence for the energy figures (self-reported).",
       "exact": false
      },
      "preservation": {
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       "contentHash": null,
       "status": "not-captured"
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     },
     {
      "id": "src-f878672917c1d6ce",
      "title": "Invest Foresight — Smart street lighting in Estonia",
      "url": "https://investforesight.com/follow-the-light-smart-street-lighting-in-estonia/",
      "publisher": {
       "name": null,
       "domain": "investforesight.com",
       "classification": "not-classified"
      },
      "sourceType": "web-page",
      "language": "und",
      "role": "claim-evidence",
      "claimRefs": [
       "clm-d329ce5edf7b0267",
       "clm-987085c7e2c5d968"
      ],
      "temporal": {
       "publishedAt": "2017-11-02",
       "updatedAt": null,
       "sourceCheckedAt": null,
       "recordLastVerifiedAt": "2026-07-25",
       "dossierCreatedAt": "2026-08-22",
       "retrievedAt": null,
       "status": "publication-and-record-dates-recorded"
      },
      "locator": {
       "type": "descriptive-source-note",
       "value": "Independent press (2017): Cityntel adaptive smart lighting in Tallinn's historic Old Town — brightness auto-adjusts to weather and traffic, remote monitoring and lamp-fault reporting.",
       "exact": false
      },
      "preservation": {
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       "contentHash": null,
       "status": "not-captured"
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     {
      "id": "src-ae61132c8a5d7df2",
      "title": "Lumoflex / Cityntel — Tallinn case",
      "url": "https://lumoflex.com/cases/",
      "publisher": {
       "name": null,
       "domain": "lumoflex.com",
       "classification": "not-classified"
      },
      "sourceType": "web-page",
      "language": "und",
      "role": "claim-evidence",
      "claimRefs": [
       "clm-d329ce5edf7b0267"
      ],
      "temporal": {
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       "updatedAt": null,
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       "recordLastVerifiedAt": "2026-07-25",
       "dossierCreatedAt": "2026-08-22",
       "retrievedAt": null,
       "status": "record-date-only"
      },
      "locator": {
       "type": "descriptive-source-note",
       "value": "Operator/vendor: ~600 Lumoflex smart controllers in the Old Town / City Centre; Lumoflex City platform serves as the central smart-lighting management system for the City of Tallinn (remote management + adaptive dimming). Vendor source — corroborated by independent press above.",
       "exact": false
      },
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     },
     {
      "id": "src-7cc32f2ffaba5981",
      "title": "Elektriala — Tallinn renews street lighting and builds a smart lighting management system",
      "url": "https://elektriala.ee/tallinn-uuendab-tanavavalgustust-ja-rajab-targa-valgustuse-juhtimissusteemi/",
      "publisher": {
       "name": null,
       "domain": "elektriala.ee",
       "classification": "not-classified"
      },
      "sourceType": "web-page",
      "language": "und",
      "role": "claim-evidence",
      "claimRefs": [
       "clm-516a00e92e7da361",
       "clm-88ebda53db4fe848",
       "clm-0c01bdfbf24b1a0d"
      ],
      "temporal": {
       "publishedAt": "2026-03-18",
       "updatedAt": null,
       "sourceCheckedAt": null,
       "recordLastVerifiedAt": "2026-07-25",
       "dossierCreatedAt": "2026-08-22",
       "retrievedAt": null,
       "status": "publication-and-record-dates-recorded"
      },
      "locator": {
       "type": "descriptive-source-note",
       "value": "Trade press (2026, partly paywalled): current status ~46,272 of 72,681 luminaires (≈64%) LED, ~1,815 km network; a multifunctional citywide urban lighting management system is planned for the 2026-2030 strategy period (not yet built).",
       "exact": false
      },
      "preservation": {
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       "contentHash": null,
       "status": "not-captured"
      }
     }
    ],
    "coverage": {
     "claimsTotal": 8,
     "claimsMapped": 8,
     "sourcesTotal": 4,
     "sourcesUsedByClaims": 4,
     "sourcesWithPublicationDate": 3,
     "sourcesWithArchive": 0,
     "sourcesWithExactLocator": 0,
     "sourcesWithContentHash": 0
    },
    "limits": [
     "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."
    ]
   }
  }
 ]
}