Outdoor lighting intensity
Measurement answer
What this metric measures
Outdoor lighting quantity, measured in lumens, per hectare of the applicable operational area during the reporting period.
Specification
Metric specification
- Result format
- Single value
- Unit
- lumen/ha — source-defined reporting unit
- Reporting basis
- Reporting period
- Aggregation
- Report the outdoor-lighting intensity for each applicable reporting boundary; do not aggregate locations with materially different natural characteristics without retaining location-level results.
- Pillar
- Environmental
- Topic
- Light pollution
- Controlled domain
- Pollution
- Entity type
- Metric
Reporting boundary
Outdoor lighting associated with the organization’s applicable operational area, with the area denominator expressed in hectares.
Verified source occurrences
Framework coverage
This is one canonical metric. The bindings below show every verified framework occurrence without creating duplicate metric pages. Edition, disclosure, role, and relationship remain source-specific.
- Adopting DisclosureSource evidence
TNFD Recommendations
- Publisher
- Taskforce on Nature-related Financial Disclosures
- Edition
- September 2023
- Requirement
- Not Specified
- Relationship
- Defines Disclosure
- Mapping outcome
- Direct Evidence
- Source locator
- Page 90, Table 8, A2.3
- Adopting Disclosure69f010f5caffdc904c15
TNFD Recommendations
- Publisher
- Taskforce on Nature-related Financial Disclosures
- Edition
- September 2023
- Requirement
- Not Specified
- Relationship
- Maps Source Identity
- Mapping outcome
- Published
- Source locator
- Page 90, Table 8, A2.3
Value structure
Dimensions and units
- Unit
- lumen/ha — source-defined reporting unit
- Reporting basis
- Reporting period
Unit meaning: Values use lumen/ha under the disclosed TNFD Recommendations method, period, location and reporting boundary.
Published dimensions
- site or location
- geography
- priority location
- business activity
- reporting period
- operational boundary
- direct-versus-proxy method
Calculation method
Formula information
- Status
- Specified
- Formula type
- Intensity
Formula
I = L / AApply the source-defined TNFD Recommendations method only within the disclosed location, ecosystem and value-chain boundary. Table 8 metric A2.3 identifies intensity of outdoor lighting in lumen per hectare as an Annex 2 optional additional metric. It is a reportable physical intensity, distinct from ecological-impact or ecosystem-condition outcomes, and should retain site and geography context.
Variables
| Symbol | Variable | Definition | Unit |
|---|---|---|---|
I | Outdoor lighting intensity | Reported outdoor-lighting quantity per hectare for the applicable reporting boundary. | lumen/ha |
L | Outdoor-lighting quantity | Outdoor-lighting quantity measured or estimated in lumens for the applicable boundary. | lumen |
A | Area | Area associated with the applicable outdoor-lighting boundary. | ha |
Verified sources
Evidence and status sources
Sustopedia checked each record-specific claim directly against primary publisher material. Labels distinguish current measurement authority from future compatibility and corroborative, legal, edition, or method status context. Corroborative evidence can support a stated limitation but cannot establish the core measurement by itself.
Measurement evidence
- Measurement evidenceChecked 27 August 2026
Recommendations of the Taskforce on Nature-related Financial Disclosures
- Publisher
- Taskforce on Nature-related Financial Disclosures
- Edition
- September 2023
- Locator
- Page 90, Table 8, A2.3
Supports: The official TNFD Recommendations source supports the identity, boundary and method basis of “Outdoor lighting intensity”.
Open official source
Use with context
Interpretation boundaries
Method disclosures required
Source-edition basis: Recommendations of the Taskforce on Nature-related Financial Disclosures, September 2023.
- Describe how the outdoor-lighting quantity in lumens was measured or estimated.
- Disclose the hectares used as the area denominator and the operational or geographic boundary to which it applies.
- Identify the relevant sites or locations and state whether the result is measured directly or derived using a proxy method.
Record-specific limitations
- Lumens per hectare is an exposure-oriented proxy for potential light-pollution pressure and does not by itself measure ecological condition or biodiversity impact.
- Comparability depends on consistent treatment of the outdoor-lighting quantity, covered area, operational boundary, and location characteristics.
- Locations with materially different natural characteristics should remain separately identifiable rather than being obscured by aggregation.
Interpret this metric with the stated reporting boundary, period convention, value shape, and unit. Results prepared with different boundaries or conventions may not be directly comparable.
Measurement evidence supports the core record-specific claims described above. Corroborative evidence can support limitations, while compatibility and status sources provide their separately labelled context. None of these cards by itself determines an organisation's legal applicability, filing readiness, assurance status, or compliance conclusion.