IES/LDT for High Mast Lighting: What to Request
This guide provides a tender-ready checklist to request IES/LDT files and the simulation outputs needed to verify targets and uniformity.
Where This Guide Fits
- Run this bundle: Highway Bundle · Stadium Bundle
- Resources: Photometrics Center
- Shortlist: AC · Solar · Stadium
Table of Contents
- What to request (checklist)
- Assumptions suppliers must state
- Acceptance metrics (what to show)
- RFQ clauses (copy/paste)
- Next steps
What to request (checklist)
- IES/LDT files for each proposed luminaire + optic
- Simulation outputs (DIALux/AGi32): Avg lux, Min lux, uniformity + calculation grid
- Layout proposal: pole heights, spacing, mounting arrangement, aiming notes
- Glare/spill mitigation notes (if required)
Assumptions suppliers must state
- Pole height, spacing, and mounting arrangement
- Optics type, CCT/CRI, aiming/tilt limits
- Area boundaries and calculation grid
- Any depreciation factor used (if any)
Acceptance metrics (what to show)
- Average illuminance (Avg)
- Minimum illuminance (Min)
- Uniformity (define which metric is used)
- Grid and assumptions in the report
RFQ clauses (copy/paste)
- Bids must include IES/LDT files + simulation outputs (Avg, Min, uniformity + assumptions).
- Layouts must include calculation grid and all assumptions.
- Bids without IES/LDT deliverables are non-compliant.