IES Photometrics & DIALux for Road Lighting (Inputs + Checklist)

Onde este recurso se encaixa

Photometrics and spacing validation should happen before quote comparison.

The 60-Second Rule (Roadway Projects)

A roadway bid is NOT verifiable unless it includes:
1) IES photometric files for the offered optics (not generic)
2) A DIALux-ready input set (road geometry + pole arrangement)
3) A report that shows spacing, uniformity, and glare-related metrics (as applicable)
4) A clear assumption list (mounting height, tilt, maintenance factor, target class)

If any item is missing, spacing claims should be treated as “Unverified / High Risk”.

What an IES File Is (and when it’s mandatory)

An IES file is a standardized electronic photometric data file that describes a luminaire’s light distribution. It is used by lighting software to calculate roadway performance.

When IES is mandatory

  • Highways / main roads
  • Any project where pole spacing and uniformity are important
  • Any project requiring an auditable lighting report
  • Streets with mixed traffic and pedestrian conflict
  • Large outdoor areas where glare complaints are possible

IES File Acceptance Checklist (Procurement-Ready)

Before using an IES file to justify spacing or compliance, confirm:

A) Correct file identity

  • The IES file is provided for the exact offered model and optic
  • The optic family / distribution is named clearly (not “all-purpose”)

B) Usability in software

  • File imports successfully into DIALux (or other common software)
  • No corrupted or missing data blocks

C) Consistency with the quotation

  • Luminous flux and input power are consistent with the quoted configuration
  • CCT and optic type match the specification (if stated)

D) Traceability

  • File naming and revision control are clear (version/date)
  • Supplier can provide updated files if optics or LED package changes

If a supplier cannot provide model-specific IES files, treat roadway spacing claims as unverified.

DIALux Intake Form (DIALux-Ready Inputs)

Use these fields in your website form to collect consistent inputs:

1) Project Basics

  • País / Cidade
  • Tipo de estrada (rodovia / estrada principal / local / parque)
  • Project quantity (estimated)

2) Road Geometry

  • Road width (m) and lanes
  • Median (yes/no) and median width (if applicable)
  • Sidewalk / pedestrian zones (yes/no)

3) Pole Layout

  • Disposição dos postes (lado único / escalonado / oposto / mediano)
  • Pole height (m)
  • Arm length / overhang (m)
  • Target pole spacing (m) or “optimize spacing”
  • Mounting tilt angle (if fixed)

4) Performance Targets (If you have them)

  • Target class / requirements (if specified by local authority)
  • Priority: higher uniformity vs lower energy vs lower glare

5) Environment & Risk

  • Coastal / desert / monsoon / vandal risk
  • Dust and soiling severity (light / medium / heavy)

6) Energy & Operation

  • Dusk-to-dawn runtime (hours)
  • Dimming preference (time-based / PIR boost)
  • Required autonomy nights (backup nights)

Attachments (optional but helpful):

  • Site drawing, typical cross-section, or reference spacing plan
  • Any local lighting requirement document

Project inputs: Download the Project Input Sheet (PDF) ou DOCX and send it with your road class, pole height, and target lux/uniformity.

What You Should Receive (DIALux Deliverables)

A “DIALux-ready proposal” should include:

  • DIALux report (PDF) showing:
  • road geometry, pole arrangement, mounting details
  • luminaire model + optic used (IES referenced)
  • spacing results and key performance metrics
  • Layout summary:
  • pole schedule (height, spacing, arm length)
  • recommended optic and mounting notes
  • Assumption list:
  • mounting height, tilt, maintenance factor (if used)
  • target class/criteria used (if specified)
  • IES file package:
  • IES files clearly named for the quoted models/optics

Copy/Paste RFQ Clauses (IES + DIALux)

Clause 1 — IES Photometric Files (Mandatory for Roadway)

Supplier must provide model-specific IES photometric files for the offered optic(s). Generic or “similar model” IES files are not acceptable for spacing validation.

Clause 2 — DIALux-Ready Report Deliverables

Supplier must submit a lighting calculation report that includes:

  • road geometry and pole arrangement assumptions
  • luminaire model and optic identification (IES referenced)
  • spacing and key performance metrics (as applicable)
  • revision control (report version/date)

Clause 3 — Assumptions Disclosure

Supplier must explicitly declare:

  • pole height, arm length, tilt
  • spacing assumptions (or optimized spacing method)
  • target class/criteria used (if specified)
  • any maintenance factor assumptions

Clause 4 — Bid Comparability Rule

Bids without IES files and a DIALux-ready input/output package shall be labeled “Unverified / High Risk” before price comparison.

Request IES & DIALux Starter Pack

Get the editable starter pack used to standardize roadway lighting proposals:

  • Formulário de admissão do DIALux (preenchível)
  • IES acceptance checklist (fillable)
  • Deliverables checklist (report + IES package)
  • Sample RFQ clauses (copy/paste)

Envie-o para mim:

  • E-mail de trabalho
  • País/cidade
  • Tipo e quantidade de estradas

Deseja uma verificação rápida da sanidade da engenharia?

Compartilhe sua classe de estrada, altura do poste, lux/uniformidade alvo e suposições de PSH do pior mês.

Próximas etapas (manter seu projeto pronto para a licitação)

Certifique-se de que seu projeto de iluminação pública solar atenda a todos os padrões de aquisição e engenharia.

Modelos e evidências

Download: Folha de entrada do projeto (pronta para licitação)

Use esse modelo para enviar dados de dimensionamento e solicitar a validação do layout IES/LDT +.

Abra a página de download →

PERGUNTAS FREQUENTES

Because roadway spacing, uniformity, and glare-related performance depend on the luminaire’s real photometric distribution, not wattage.

No. Treat such spacing claims as unverified and high risk.

Request updated IES files with revision control and ensure the report references the correct IES version.

Road width/lanes, pole arrangement, pole height, arm length/overhang, spacing target, mounting details, and any required criteria.

A calculation report (PDF), assumption list, layout summary (pole schedule), and the IES file package named for the quoted models/optics.