Technical Compliance and Safety Notice
Disclaimer: This guide is intended for professional electricians and contractors. All lighting installations must comply with the National Electrical Code (NEC®), local building codes, and OSHA safety standards. The data provided below serves as a technical reference for project bidding and specification; however, final designs for high-risk or complex environments should be reviewed by a licensed electrical engineer or a certified lighting professional (LC).
The Data That Wins the Bid
For electricians and contractors, specifying a lighting project is more than just picking a fixture; it’s about guaranteeing performance, safety, and efficiency. When you submit a proposal for a warehouse, gym, or industrial facility, clients and engineers look for verifiable data, not just marketing promises.
Missing technical files can get your bid disqualified before it’s even reviewed. Based on our experience supporting thousands of contractor submittals at Hyperlite, a common reason for project delays is the inability to provide a "Submittal Package" that meets engineering scrutiny. This guide outlines the essential photometric and technical data you must have on hand to secure approval.
1. The Foundation: Photometric Files and Performance Reports
Before you can calculate placement or prove energy savings, you need the fundamental performance files for the luminaire. These are non-negotiable for any professional-grade project.
IES Files: The Digital Twin of Light
An IES (.ies) file is the single most critical piece of photometric data. It is a standardized text file, defined by the Illuminating Engineering Society (IES) in the LM-63 standard, that describes how a specific fixture distributes light in three-dimensional space.
Lighting designers import this file into software like AGi32 or DIALux to create accurate lighting simulations. Without it, they cannot:
- Predict light levels (foot-candles) on the floor and work surfaces.
- Ensure uniformity to avoid "puddles of light" and dark spots.
- Calculate S/MH (Spacing to Mounting Height) to determine the optimal number of fixtures.
- Generate professional layouts to include in your formal proposal.
Pro Tip: If you don't have specialized software, you can use free web-based IES viewers to verify the beam shape before sending the file to a designer.
LM-79 Report: The Official Performance Transcript
If the IES file is the map, the LM-79 report is the certified spec sheet. An LM-79 test, officially known as the IES LM-79-19 Approved Method, measures the performance of the entire luminaire. It is the baseline for utility rebate eligibility through programs like the DesignLights Consortium (DLC) Qualified Products List.
Key data points to verify in an LM-79 report:
- Total Luminous Flux: The actual measured lumen output (often lower than the "raw" LED lumens).
- Luminous Efficacy (lm/W): Crucial for ROI calculations. High-performance UFO high bays should typically exceed 130–150 lm/W.
- CCT and CRI: Verifies color temperature (e.g., 5000K) and color accuracy (typically 80+ for industrial use).
- Power Factor (PF): Look for >0.90 to ensure electrical efficiency and compliance with commercial standards.
Technical Rule of Thumb: Never size a project by lumens alone. A 20,000-lumen fixture with a 120° beam angle might be perfect for an open warehouse, but for a narrow-aisle facility, that same lumen output requires a 60° or 90° optic to put the light where it’s actually needed.
2. Proving Durability and Safety
Performance wins the design, but safety and reliability data get the project signed off by inspectors and ensure long-term client satisfaction.
Lifetime Projections: LM-80 and TM-21 Reports
While many manufacturers claim a "100,000-hour lifetime," professionals look for the LM-80 and TM-21 reports to validate these figures.
- IES LM-80: Tests the lumen depreciation of the LED chips over a minimum of 6,000 to 10,000 hours.
- IES TM-21: A mathematical formula used to project the LM-80 data into the future.
The "6x Rule" Warning: Per IES standards, a manufacturer cannot claim a projected lifetime (L70) greater than six times the actual test duration. If the chips were only tested for 10,000 hours, the maximum "reported" lifetime allowed on a technical submittal is 60,000 hours, regardless of what the marketing brochure says.
Essential Safety and Durability Ratings
- UL/ETL Listing: Indicates compliance with North American safety standards, primarily UL 1598 for Luminaires. This is mandatory for passing electrical inspections.
- IP65 Rating: Per IEC standard 60529, this confirms the fixture is dust-tight and protected against water jets—essential for "wash-down" areas or dusty workshops.
- IK08 Rating: Measures impact resistance. In gymnasiums or low-clearance warehouses, an IK08 rating ensures the fixture can withstand a 5-joule impact without failing.
Products like the Hyperlite Black Hero Series (21,750 lumens) integrate these specs by providing selectable CCT/wattage, verified UL/DLC listings, and IP65 protection in a single submittal package.
3. Applying the Data: Design Best Practices
Use these industry heuristics to evaluate your lighting layout before the client sees it.
High Bay Design Heuristics (Typical Industrial)
| Parameter | General Warehousing | Inspection/Packing Zones | Technical Purpose |
|---|---|---|---|
| Avg. Illuminance | 30–40 fc | 75–100 fc | Task-appropriate light levels. |
| Uniformity (Min/Avg) | ≥ 0.5 | ≥ 0.7 | Eliminates visual fatigue and shadows. |
| Glare (UGR) | ≤ 25 | ≤ 22 | Ensures worker comfort and safety. |
| S/MH Ratio | 1.2–1.5 | 0.7–1.0 | Standardizes fixture spacing. |
Contractor’s Submittal Checklist (Downloadable Template)
To streamline your bid, ensure your "Technical Package" includes the following for every fixture type. You can copy this list into your RFI (Request for Information) to your supplier:
- [ ] IES File (.ies): For photometric calculation.
- [ ] LM-79 Report (PDF): For efficacy and color verification.
- [ ] LM-80 / TM-21 Data: For L70 lifetime validation.
- [ ] UL/ETL Certificate: Provide the specific File Number (e.g., E483348) for the inspector.
- [ ] DLC QPL Product ID: Essential for the client to claim utility rebates.
- [ ] IP/IK Ratings: Verified via the spec sheet or test report.
- [ ] Dimming Protocol: Confirm 0-10V compatibility for controls.
About the Source
This guide was developed by the Hyperlite Engineering Support Team. We specialize in providing contractors with DLC-certified high bay solutions and complimentary IES lighting layouts. Our technical experts review hundreds of project specifications monthly to ensure compliance with North American electrical and lighting standards.
Frequently Asked Questions (FAQ)
What is the difference between an LM-79 and LM-80 report?
LM-79 tests the entire fixture (how the whole light performs today). LM-80 tests the LED chips only (how the light source will degrade over years). You need both for a complete submittal.
Why does the DLC listing matter to my client?
The DesignLights Consortium (DLC) list is used by utility companies to determine rebate eligibility. If a fixture isn't on the QPL (Qualified Products List), the client may lose out on thousands of dollars in energy incentives.
Can I use a 120° beam angle in a 30-foot ceiling?
While possible, it is often inefficient. At 30 feet, a 120° beam spreads the light so wide that foot-candle levels on the floor may be insufficient. A 90° optic or a higher-lumen fixture with a tighter beam is usually preferred for mounting heights above 25 feet.
What is 0-10V dimming?
It is the industry-standard analog control protocol for commercial LEDs. It uses two low-voltage wires to tell the driver to dim. It is required for most energy codes (like Title 24) that mandate occupancy sensing or daylight harvesting.