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Passive Daylight Illumination: Uses natural external sunlight to safely illuminate dark cargo trailer interiors, reducing energy costs and fleet power draw.
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Tailored for 0.31" Composite Panels: Supplied with a specific gasket profile engineered to form a flush, watertight seal over heavy-duty 0.31-inch thick trailer wall or roof composite panels.
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Hermetic Peel-and-Stick Gasket: High-tack adhesive backing lines the perimeter flange to completely isolate and lock out water and moisture.
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Heavy-Duty Polycarbonate Mold: Built from impact-resistant clear polycarbonate plastic designed to withstand low-hanging tree branches and harsh outdoor wear.
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Easy Snap-In Profile: Built with a user-friendly snap-fit border that fits securely into standard 4-inch panel cutouts without needing separate mechanical fasteners.
Truck-Lite 40271C Sky-Lite Clear 4" Round Replacement Lens (For 0.31" Composite Panels, Dome & Utility Openings, Snap-Fit with Adhesive Gasket, Impact-Resistant Polycarbonate)
Bring instant, zero-power interior lighting to your cargo trailer or commercial box truck with the specialized Truck-Lite 40271C Sky-Lite Round Clear Lens. This innovative 4-inch round clear polycarbonate lens functions as an integrated vehicle skylight, allowing natural ambient sunlight to illuminate the cargo interior during daytime operations. This provides immediate visibility for loading and unloading without drawing battery power or requiring intricate wiring configurations.
Engineered to fit heavy-duty freight trailers, vocational vehicles, and dry vans, the Truck-Lite 40271C is specifically optimized to match thicker 0.31-inch composite panels. The unit features a precise snap-fit mounting profile combined with a premium, high-adhesion peel-and-stick foam gasket. When firmly installed, the gasket creates a tight, permanent barrier against weather, road spray, and moisture intrusion. Manufactured from ultra-durable, impact-resistant polycarbonate plastic, this utility lens is designed to resist cracking, hazing, and fracturing from weather elements or shifting cargo loads.
NAPA: 40271C
TruckPro: TK40271C
Interchange Part Numbers: 40271C TLT, 40271CTLT, TL 40271C, TL40271C, TK40271C
Truck-Lite structural alternatives: 40270C (For 0.05" aluminum sheets), 40275C (For 0.25" composite panels)

