INSIGHTS
Technical guidance for photometric permitting.
Practical references on code requirements, plan review, and lighting documentation for commercial projects.
Mar 07, 2026
What Is a Photometric Plan? Complete Guide (2026)
A photometric plan maps light distribution across a site with foot-candle grids, fixture schedules, and compliance data. Learn what's included, what it costs, and when you need one.
Read guideMar 10, 2026
How Much Does a Photometric Plan Cost? 2026 Pricing Guide
Photometric plans typically cost $300-$2,500 for commercial projects. See what drives pricing, what's included, and when "free" plans fall short.
ReadMar 10, 2026
Dark Sky Ordinances Explained: What They Mean for Your Lighting Project
Dark sky ordinances regulate fixture shielding, color temperature, and light trespass. Learn what they require and how they affect your photometric plan.
ReadMar 10, 2026
IES RP-20 Explained: Parking Facility Lighting Standards
IES RP-20 sets illuminance and uniformity standards for parking lots and garages. See the recommended levels and how plan reviewers apply them.
ReadMar 10, 2026
Free Photometric Plans vs. Professional Plans: What's the Real Difference?
Free manufacturer photometric plans sell fixtures. Professional plans serve your project. Here's how to decide which one your project actually needs.
ReadMar 10, 2026
California Title 24 Lighting Requirements: What You Need for Your Photometric Plan
Title 24 Part 6 sets strict outdoor lighting power and control requirements. Learn what your photometric plan needs for California permit compliance.
ReadMar 06, 2026
Parking Lot Photometric Requirements — What Plan Reviewers Check
Illumination values, documentation details, property-line checks, and IES RP-8 compliance that plan reviewers look for in parking lot photometric submittals.
ReadMar 04, 2026
Why Photometric Plans Get Rejected at Plan Check
The most common reasons lighting submittals fail plan review - missing calculations, code gaps, and documentation errors - and how a permit-ready package avoids them.
ReadMar 02, 2026
How to Read a Photometric Plan — A Plain-Language Guide
Understand calculation grids, contour lines, fixture schedules, property-line checks, BUG ratings, and the code notes plan reviewers care about.
ReadMar 01, 2026
DIALux EVO vs. AGi32: Which Software Produces Better Photometric Plans?
AGi32 is the US standard for exterior permit-ready photometric plans. DIALux EVO is free and excels at interior visualization. Here's how they actually compare.
ReadFeb 28, 2026
Warehouse Lighting Design: Foot-Candle Requirements, Layout Tips & Common Mistakes
Warehouse foot-candle requirements range from 5 fc for storage to 50+ fc for inspection. Learn IES levels, layout strategies, and costly design mistakes.
ReadFeb 27, 2026
What to Expect When You Order a Photometric Plan: Timeline, Process & Deliverables
Ordering a photometric plan takes 3–7 business days. Learn the four stages, what you provide, what you receive, and how the plan review process works.
ReadFeb 26, 2026
Light Trespass Explained: How to Prevent Neighbor Complaints and Code Violations
Light trespass is light crossing your property line where it's not wanted. Learn the code limits, common causes, and how to fix or prevent violations.
ReadFeb 25, 2026
Understanding IES Files: What They Are, Why They Matter, and How to Get Them
An IES file contains a luminaire's measured light distribution data. Learn what's inside, why it matters for your photometric plan, and where to download them.
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