A lighting effects assessment is often the key piece of evidence for resource consent lighting decisions where outdoor light may affect neighbouring sites or sensitive environments. A report can look technically sound, yet still raise questions once it is tested against district plan rules, peer reviewed, or considered through submissions.
Councils are not only looking for modelling outputs. They want decision-ready information that explains how lighting will behave in practice, what effects people will experience on the ground, and what will be done to manage those effects in context.
This guide sets out what a robust assessment should cover, what reviewers typically look for, and how early independent input can reduce redesign and delays later in the approvals process.
In a hurry – direct answers
- A lighting effects assessment is planning evidence used in resource consent processes to explain how proposed lighting will affect surrounding land uses and the night-time environment.
- Councils look for clear assumptions: luminaire type, mounting height, aiming, controls, and operating hours, so they can judge what will happen on site in practice.
- Results matter, but numbers alone are not enough. A good assessment explains what light spill, glare, and sky glow will look like at boundaries and in sensitive areas.
- The receiving environment and planning framework should be stated upfront, including relevant district plan rules, designations, and any consent triggers or conditions.
- Mitigation must be specific and buildable, for example shielding, aiming changes, dimming, curfews, and commissioning checks, not a generic promise to comply.
- Consistency between drawings, modelling outputs, and the written narrative is what reduces RFIs, late redesign, and restrictive consent conditions.
- Early independent input helps identify planning risk while options are still open, which protects programme, budget, and community outcomes.
- A robust assessment is written so non-lighting reviewers can follow it, and it can stand up in peer review, submissions, or a hearing if required.
What is a lighting effects assessment, and what does it cover?
A lighting effects assessment is a planning document. It is a type of lighting assessment focused on off-site effects, and its role is to explain how proposed lighting will affect its surroundings and whether those effects are acceptable within the relevant planning framework.
At a minimum, a consent-ready assessment should clearly describe:
- The proposal and lighting intent, including how and when lighting will operate.
- The planning context, including applicable district plan rules, designations, and any consent triggers.
- The receiving environment, including nearby land uses and levels of sensitivity.
- The predicted lighting effects expressed in a way that is relevant to planning outcomes (not just raw numbers).
- The measures proposed to manage or mitigate effects, where required.
The purpose is not simply to demonstrate compliance with a standard. It is to provide a clear, balanced explanation of effects in context so planners and decision-makers can make an informed call.
When you might need one
Councils and planners often request a lighting effects assessment where outdoor lighting could affect adjacent land uses or the wider night-time environment, for example:
- Sports fields and training facilities
- Car parks, yards, and large outdoor work areas
- Industrial sites, freight and logistics facilities
- Transport projects and public space lighting upgrades
- Architectural facade lighting, signage, and feature lighting
If you are unsure, your project planner can confirm the consent triggers. Early technical input helps avoid late changes once layouts and infrastructure are fixed.
Mid-project and unsure what council will ask for?
Send your site address, a concept plan, and proposed operating hours. We will confirm the key inputs needed for a consent-ready lighting effects assessment and the likely risks to address early. contact us.
What councils and hearing panels look for in lighting effects assessments
Lighting effects assessments are often reviewed by planners, peer reviewers and, in some cases, hearing panels who may not be lighting specialists. What they need is clarity and confidence that the assessment reflects how the site will actually operate.
Clear methodology and assumptions
Reviewers expect the methodology to be explained, not just named. That includes setting out which criteria are being assessed and why they are relevant to the site and planning context.
Assumptions should be transparent. Mounting heights, aiming angles, operating times, surface reflectance and screening all influence outcomes. If inputs are not clearly stated, reviewers are left to question whether the results are realistic.
Effects-based assessment, not just numbers
Lux values and compliance limits may be part of the picture, but councils are primarily concerned with effects. A robust assessment translates technical outputs into what people will experience at boundaries, in public spaces, and at sensitive locations.
Where outcomes depend on future design decisions, that uncertainty should be stated early. Being upfront about assumptions builds credibility and reduces challenges later.
Evidence that stands up to scrutiny
Lighting evidence may be tested through requests for further information, peer review, or a hearing process. For that reason, documentation needs to be clear, consistent and defensible.
Councils expect alignment between drawings, modelling outputs, written assessment and planning material. Inconsistencies, even minor ones, can undermine confidence and trigger additional review or conditions.
Stage guide – what is typically needed at each step
The level of detail required depends on project scale, location, and the receiving environment. This table shows what is typically needed to keep approvals moving with fewer surprises.
| Stage or scenario | What is needed | Why it matters | Typical outputs |
|---|---|---|---|
| Early concept or feasibility | Confirm likely consent triggers, sensitive receptors, and the lighting intent (where, when, and why). | Identifies constraints early so the design does not lock in non-compliant pole locations, heights, or operating assumptions. | Early risk note and information list for the planner and design team. |
| Pre-application or scheme design | Draft layout, indicative luminaire selection, mounting heights, aiming strategy, and a clear operating profile. | Sets realistic modelling inputs and reduces the chance of further information requests once lodged. | Draft modelling summary, assumptions schedule, and recommended mitigation options. |
| Consent lodgement | A complete assessment report aligned to the district plan framework, with defensible modelling outputs and clear mitigation. | Gives council decision-makers confidence the effects are understood and managed in context. | Lighting effects assessment report (PDF) with plans, contours, and effect discussion. |
| RFI, peer review, or design iteration | Targeted clarifications, sensitivity checks, and revisions where assumptions or design details change. | Keeps approvals moving and avoids conditions that create ongoing operational burden. | RFI response content, updated outputs, and a tracked change summary. |
| Submissions or hearing support (if required) | Clear explanation of methodology and assumptions, consistent exhibits, and expert input that aligns with planning evidence. | Protects the project when effects are challenged by submitters or reviewers. | Concise technical summary and supporting exhibits for the project team. |
| Post-install verification (when required by conditions) | Commissioning checks and, where appropriate, a light survey to confirm installed performance matches the approved intent. | Reduces complaints risk and provides evidence if council requires verification. | Verification note or survey report based on what the consent conditions require. |
Common mistakes and what can go wrong
Most problems are not caused by bad intent. They are caused by unclear inputs, late timing, or assessments that do not explain effects in context.
- Treating the assessment as a compliance checklist, rather than explaining effects in context.
- Unstated or unrealistic assumptions (aiming angles, mounting heights, surface reflectance, or operating times) that make results hard to trust.
- Mismatch between drawings, luminaire schedule, and the modelled scenario.
- Not describing the receiving environment, especially sensitive boundaries and typical night-time conditions.
- Leaving mitigation vague, for example ‘lighting will be adjusted if required’, without defining what adjustments are practical.
- Starting the assessment after civil and electrical layouts are fixed, when changes become expensive and disruptive.
What you receive
A robust scope is about clarity on outputs. Depending on what the project requires, you will typically receive:
- Lighting effects assessment report (PDF) written for planning decision-makers, with clear assumptions and an effects-based narrative.
- Modelling outputs (contour plots and summary tables) that align with the drawings and the described operating scenario.
- Assumptions schedule (luminaire type, mounting heights, aiming, controls, and operating hours) so the design intent is transparent.
- Mitigation recommendations that are specific and buildable (for example shielding, aiming adjustments, dimming profiles, curfews, and controls logic).
- Support during council review where needed, including input to RFIs and peer review responses.
- Optional site light survey and measurement where existing conditions or in-situ performance need to be verified.
Scope notes to keep it defensible:
- Council and district plan requirements vary. Your planner should confirm the applicable rules and consent triggers for the site.
- Assessment outcomes rely on the design inputs provided. Changes to pole locations, mounting heights, luminaire selection, aiming, or operating hours may require the modelling and report to be updated.
- If the project needs an existing light survey, access, safety, and suitable site conditions (including weather) are required for reliable measurement.
What we need from you to scope and move quickly
To price and programme the work accurately, it helps if you can provide:
- Site address and a short description of the proposal (use, hours of operation, and why lighting is required).
- Current site plan and concept lighting layout (pole locations, heights, and any luminaire schedule if known).
- Operating profile: proposed on and off times, curfews, dimming approach, and any controls strategy (manual, sensor, or scheduled).
- Nearby land uses and known sensitivities (residential boundaries, public spaces, ecological areas, transport corridors).
- Planning context from the project planner (district plan rules, designations, and any draft consent conditions if already in play).
- Any existing lighting complaints, incident history, or stakeholder concerns that need to be addressed in the assessment.
How Leading Design Professionals support consent-ready assessments
Leading Design Professionals approach a lighting effects assessment as part of the wider planning and approvals process, not as a standalone technical exercise.
As independent illumination and electrical engineers, the focus is on clear, decision-ready evidence that planners and decision-makers can rely on. Where existing lighting conditions or site characteristics are relevant, we can undertake a light survey to understand how a space is performing in practice.
We support projects across Auckland and New Zealand, working alongside planners and delivery teams to identify consent risk early, respond to RFIs, and keep documentation consistent if the assessment is peer reviewed or tested through submissions.
Next step – choose your path
If you want to reduce approval risk and avoid late redesign, the simplest next step is to talk early. Choose the path that suits your project:
- Book a short scoping call to confirm likely consent triggers and the information required.
- Send plans and site address so we can review the layout, operating profile, and key risks.
- If you are already in lodgement or responding to an RFI, send the council questions so we can advise what evidence is needed next.
To get started, contact us.
FAQs
What is the difference between a lighting design and a lighting effects assessment?
A lighting design focuses on delivering the required lighting performance for users. A lighting effects assessment explains how that lighting will affect surrounding properties and the wider night-time environment for planning decisions.
Do I need a lighting effects assessment for every resource consent?
Not always. It is typically required where outdoor lighting may affect neighbouring sites or sensitive environments. Your planner can confirm whether resource consent lighting evidence is needed under the relevant district plan rules or consent conditions.
What do councils usually want to see in a lighting effects assessment?
Clear assumptions, an explained methodology, modelling outputs, and a plain-English discussion of effects and mitigation in the context of the receiving environment.
Are modelling results enough on their own?
Usually not. Councils want to understand what the numbers mean in real terms, how reliable the inputs are, and what controls or mitigation will be in place once the site is operating.
Can we use supplier lighting calculations for consenting?
Supplier calculations can be a useful input, but councils often expect an independent assessment that clearly states assumptions and explains effects in the planning context.
What happens if the lighting design changes after the report is lodged?
If key inputs change, the assessment may need to be updated. Keeping the assumptions schedule clear makes it easier to identify what has changed and whether effects also change.
Do you need to measure existing light levels on site?
Sometimes. Where existing lighting conditions, reflectance, or complaints are relevant, a light survey can help confirm real-world performance and strengthen the evidence base.
Can LDP support RFIs, peer review, or a hearing process?
Yes, where required. The priority is keeping the technical evidence consistent and defensible across the report, drawings, and any planning material used in review or hearings.
