Waterproof LED Tunnel Light Aluminum Shell

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Product Introduction

Waterproof LED tunnel light aluminum shells serve as the primary structural housing for LED tunnel lighting assemblies deployed in highway tunnels, road underpasses, subterranean passages, and demanding transit infrastructure.
The housing provides a precise mechanical and thermal mounting platform for LED modules, drivers, optical lens arrays, gaskets, cable glands, and installation brackets. For OEM and project-based procurement, housings are manufactured strictly to 2D engineering drawings, 3D CAD models, or approved physical samples.

Technical Specifications

Parameter / Category	Specification / Option Details
Material Grades	Die-cast: ADC12, A380 Extrusion / CNC: 6063-T5, 6061-T6
Manufacturing Processes	High-pressure die casting, precision aluminum extrusion, multi-axis CNC machining
Surface Treatments	Anodizing, outdoor-grade polyester powder coating (RAL colors), electrophoresis
Corrosion Resistance	Neutral Salt Spray (NSS) test up to 500+ hours (ASTM B117 / ISO 9227)
Thermal Performance	Customizable dissipation fins; housing thermal conductivity up to 200+ W/mK (extrusion)
Enclosure Protection	Designed to support system-level IP65, IP66, or IP67 ratings upon final assembly
Standard Compliance	RoHS and REACH compliant raw materials
Machining Precision	CNC Milling/Drilling/Tapping with critical tolerances down to +/- 0.02 mm

Key Structural & Engineering Features

Optimized Heat Dissipation Structure

The aluminum housing forms the direct thermal path between the LED substrate and the external environment. Wall thickness, contact surface flatness, and external heat-sink fins are engineered based on thermal load requirements to prolong LED and driver operational lifespan.

Waterproof Enclosure Integration

While final ingress protection (IP rating) depends on the complete luminaire assembly, the housing features precision-machined sealing channels and flat gasket contact faces. Sealing geometry is strictly controlled to ensure consistent compression across silicone or EPDM gaskets.

Precision CNC Machining

Critical mounting zones-including LED PCB mounting surfaces, driver bays, threaded cable entry ports (Metric / NPT), sealing grooves, and bracket interfaces-undergo high-precision CNC milling, drilling, and tapping to ensure zero interference during automated mass assembly.

Surface Protection & Finishing

All components undergo thorough deburring to eliminate sharp edges that could damage seals or wire insulation. Surface treatments are tailored for high-humidity, salt-spray, or underground chemical environments, offering superior UV, corrosion, and wear resistance.

Typical Applications

Highway, expressway, and motorway tunnels
City road underpasses and subterranean walkways
Railway and mass transit infrastructure
Industrial utility tunnels and mining corridors
High-humidity, wash-down, or semi-enclosed industrial facilities

Buyer Qualification & Quality Assurance

To ensure consistent quality and long-term supply reliability across repeat orders, quality control procedures cover:

Raw Material Inspection: Chemical composition verification and Material Test Certificates (MTC).

In-Process Quality Control: CMM (Coordinate Measuring Machine) dimensional checks, thread gauge validation, and sealing channel depth inspection.

Final Assurance: Surface coating thickness testing, trial assembly fitment checks, and export packaging inspection.

Procurement Checklist: Information Required for Quotation

To receive an accurate OEM/ODM manufacturing quote, please provide:
• 2D Engineering Drawings (PDF / DWG) with tolerances specified.
• 3D CAD Models (STEP / IGES / X_T).
• Material Grade and Surface Treatment requirements (Color, coating type, salt spray hours).
• Estimated Order Quantities (Initial trial order and annual projection).
• Application-specific testing or compliance requirements.

FAQ

Q: Can you supply fully certified IP67 or IP68 waterproof housings?

A: The aluminum housing provides the rigid structural foundation and precision-machined gasket grooves necessary to achieve IP65, IP66, or IP67 ratings. However, the final IP rating must be certified on the complete, fully assembled fixture (including glass, gaskets, drivers, and cable glands).

Q: What aluminum alloy is best for my tunnel lighting project?

A: For complex, highly integrated shapes with complex internal mounting pillars, high-pressure die-casting alloys like ADC12 or A380 are recommended. For high-power fixtures requiring maximum thermal conductivity and continuous linear profiles, extruded 6063-T5 or 6061-T6 aluminum is the preferred choice.

Q: How do you ensure the flatness of the thermal interface surface for the LED PCB?

A: LED contact surfaces undergo dedicated CNC facing or precision milling operations to maintain optimal surface flatness, minimizing air gaps and maximizing heat transfer efficiency when paired with thermal interface materials (TIM).

Q: Do you provide First Article Inspection (FAI) reports before mass production?

A: Yes, every custom project includes a full First Article Inspection (FAI) report-covering CMM dimensional measurements, surface treatment thickness, and material composition certificates-for client approval prior to mass production.

Q: Can you customize cable entry thread standards and branding on the housing?

A: Yes. Cable entry holes can be precision-tapped to NPT, Metric, or PG thread specifications.

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