Third-Party Certified for Every Hazardous Environment
Certification is not a checkbox. It is the foundation of every product we sell. Here is what our certifications mean and why they matter for your facility.
UL Listed — UL 844
What It Means
Independent testing by Underwriters Laboratories verifying the fixture can operate safely in classified hazardous locations without becoming an ignition source. UL 844 is the specific standard covering luminaires for use in hazardous locations, including evaluation of enclosure integrity, temperature ratings, and fault performance.
Why It Matters
Required by NFPA 70 (NEC) Article 500–516 for all lighting in classified areas. Your insurance carrier, authority having jurisdiction (AHJ), and regulatory compliance all depend on it. An unlisted fixture in a classified area is not just non-compliant — it is a liability that voids insurance coverage and creates personal liability for the specifying engineer.
NEC Classification: Class I, Division 1
What It Means
A location where flammable concentrations of gases or vapors exist continuously, intermittently, or periodically during normal operations. Class I, Division 1 is the most stringent hazardous location classification under the NEC. Lighting specified for these areas must be fully explosion-proof — capable of containing any internal arc or explosion without igniting the surrounding atmosphere.
Why It Matters
Division 1 classification cannot be downgraded by good engineering practice alone — the fixture itself must carry the rating. Misspecifying a Division 2 fixture in a Division 1 area is a code violation with severe consequences during inspections, insurance audits, and incident investigations. EcoLite-EXP C1D1 products carry UL 844 listing numbers available for AHJ submission.
Typical Applications
- Inside fuel storage tanks
- Spray booths and open solvent processing
- Areas around tank vents and relief valves
- Open processing with solvent evaporation
- Refinery process unit interiors
Required Protection Methods
- Explosion-proof (flameproof) enclosures
- Purged and pressurized systems (Type X, Y, Z)
- Intrinsically safe circuits
NEC Classification: Class I, Division 2
What It Means
Flammable gases or vapors are handled, processed, or used — but normally contained in closed systems or confined by positive ventilation. Hazardous concentrations could be present only if equipment fails or during abnormal operation. Division 2 areas typically surround or border Division 1 areas and require fixtures that cannot become ignition sources even when a hazardous concentration is present unexpectedly.
Why It Matters
Division 2 is still a hazardous location. Standard commercial or industrial LED fixtures are not rated for Division 2 use. Facility operators who install non-rated equipment in Division 2 areas face the same compliance and insurance consequences as Division 1 violations. Our Division 2 fixtures are purpose-engineered for these peripheral hazardous zones with the documentation to prove it.
Typical Applications
- Pump rooms and compressor buildings
- Petroleum tank farms
- Areas adjacent to Class I Division 1 boundaries
- Outdoor processing areas with potential for gas release
- Chemical plant peripheral zones
Required Protection Methods
- Non-incendive equipment
- Sealed or hermetically sealed devices
- Explosion-proof enclosures (also acceptable)
- Purged and pressurized systems
NEC Classification: Class II, Division 1 & 2
What It Means
Areas where combustible dust is present in sufficient quantities to pose an explosion or fire hazard. Class II covers three dust groups: Group E (metal dusts including aluminum and magnesium), Group F (coal and carbon black), and Group G (grain, wood, plastics, and organic dusts). Division 1 locations have dust present continuously or periodically during normal operations; Division 2 locations have dust present only during abnormal conditions.
Why It Matters
Combustible dust explosions are responsible for catastrophic industrial incidents across grain handling, food processing, and metal fabrication industries. A Class II certified fixture is fully sealed to prevent dust accumulation on hot surfaces that could reach ignition temperature — and to prevent external dust ignition from internal arcing. Standard LED high bays are not rated for Class II and create both a safety and compliance failure.
Typical Applications
- Grain elevators and silos
- Flour mills and starch processing
- Coal plants and handling facilities
- Metal powder processing
- Pharmaceutical dry powder handling
- Feed mills and agricultural processing
NEC Classification: Class III
What It Means
Areas with ignitable fibers or flyings that are not likely to be in suspension in air in quantities sufficient to produce ignitable mixtures, but where fibers are handled, manufactured, or used. Class III primarily governs textile manufacturing, woodworking operations, and cotton gin facilities where fiber accumulation on fixtures can become a fire hazard even without suspension in air. Fixtures must prevent fiber accumulation on surfaces that could exceed ignition temperatures.
Why It Matters
Class III locations are less commonly classified but require specific fixture designs to prevent fiber accumulation on hot surfaces. NEC Article 503 requires that fixtures for Class III locations be specifically listed for those environments. Operations such as textile mills, sawmills, and cotton processing facilities require Class III rated luminaires in areas where fiber or flyings are generated, handled, or transported.
Typical Applications
- Textile manufacturing and weaving mills
- Cotton gin operations
- Sawmill cutting and planing areas
- Woodworking shops generating wood flour
- Rayon and synthetic fiber production
IP Rating System (IEC 60529)
What It Means
The Ingress Protection (IP) rating system, defined by IEC 60529, classifies the degree of protection provided by mechanical casings and electrical enclosures against intrusion of solid particles (first digit) and liquids (second digit). For hazardous location luminaires, IP ratings determine suitability for wet locations, wash-down environments, offshore marine applications, and areas with chemical spray or immersion exposure.
Why It Matters
A fixture with a Class I hazardous location rating but an insufficient IP rating can fail mechanically in wet or chemically aggressive environments — allowing water or chemical ingress that destroys the enclosure integrity. For coastal, offshore, and chemical plant applications, the IP rating is as operationally critical as the NEC classification. All EcoLite-EXP fixtures carry both NEC classification ratings and IP ratings appropriate to the application.
| Rating | Solid Protection | Liquid Protection |
|---|---|---|
| IP65 | Dust-tight (no ingress) | Protected against water jets from any direction |
| IP66 | Dust-tight (no ingress) | Protected against powerful water jets from any direction |
| IP67 | Dust-tight (no ingress) | Protected against temporary immersion (up to 1m, 30 minutes) |
| IP68 | Dust-tight (no ingress) | Protected against continuous immersion (beyond 1m — per manufacturer spec) |
ATEX (Atmosphères Explosibles)
What It Means
ATEX is the European regulatory framework governing equipment and protective systems intended for use in potentially explosive atmospheres, governed by Directive 2014/34/EU. ATEX certification is the European equivalent to NEC/UL classification and is independently verified by notified bodies (third-party testing laboratories). ATEX-rated equipment is marked with the Ex symbol and a category code indicating the applicable zone and gas/dust group.
Why It Matters
Required for projects with European export requirements, international facilities operating under EU standards, or multinational corporations with standardized global compliance programs. ATEX certification also indicates alignment with IECEx (the international equivalent), which is recognized in Australia, Brazil, and many other jurisdictions outside the US and EU. For global projects, specifying ATEX-rated fixtures eliminates the need for re-qualification at international sites.
When ATEX Certification Is Required
- EU-located facilities or operations
- Export of equipment destined for EU installation
- International corporate compliance standards (IECEx equivalence)
- Facilities in Australia, South Africa, Brazil operating under IECEx framework
- Multinational operator global equipment standardization programs
DLC (DesignLights Consortium)
What It Means
The DesignLights Consortium QPL (Qualified Products List) is an energy efficiency certification program recognizing LED products that meet minimum performance requirements for lumens per watt efficacy, color rendering, and long-term light output maintenance. DLC listing is the standard gateway to utility rebate programs and energy incentive programs administered by electric utilities across North America.
Why It Matters
Reduces net project cost for qualifying facilities. Many industrial facility operators assume that explosion-proof lighting is excluded from utility rebate programs — but DLC-listed hazardous location fixtures qualify for the same rebate incentives as standard industrial LED retrofits. Depending on the utility territory and project scale, rebates can offset 20–40% of the fixture cost, significantly improving project ROI and payback period.
Rebate Program Notes
- DLC QPL listing required by most utility rebate programs
- Rebate amounts vary by utility territory — contact your utility for current program details
- Pre-approval often required before installation — plan ahead
- EcoLite-EXP can provide DLC QPL numbers for rebate applications
—
Complete certification numbers, test reports, and AHJ submission packages available upon request.
Download Our Full Certification Reference Guide
Complete certification numbers, test standards, applicable NEC articles, and application guidance — in one document for your AHJ submission.
Request Certification Guide