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Vibration-Welded / Sonically Sealed Body: The premium clear polycarbonate lens and housing are fused together to form a completely sealed unit, protecting internal components from environmental hazards.
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Shock-Mounted Heavy-Duty Bulb: An internal elastomeric bulb cradle dampens severe road jolts and chassis vibrations, preventing premature filament failure and reducing fleet maintenance downtime.
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Standard 4-Inch Circular Design: Fits perfectly into standard 4-inch industry mounting setups, allowing you to use your existing 40 Series grommets, flanges, and brackets.
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Industry-Standard PL-2 Connection: Features an integrated 2-pin PL-2 socket on the back of the housing for quick, plug-and-play installation with standard right-angle or straight pigtail harnesses.
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Future-Proof Upgrade Path: Because it utilizes standard 4-inch mounting spacing, it offers an effortless, drop-in transition to LED systems down the road using Truck-Lite’s Super 44 Series.
Truck-Lite 40203 – 40 Series 4" Round Clear Sealed Incandescent Interior Dome Light (PL-2 Connection, 12V)
Restore clean, bright, and dependable interior illumination to your commercial cab or cargo compartment with the heavy-duty Truck-Lite 40203 40 Series Dome Light. Engineered as an industry-standard replacement lamp, this 4-inch round clear sealed light head is the perfect choice for heavy-duty commercial semi-trucks, step vans, box trucks, utility trailers, and vocational service bodies.
Built to handle the constant vibration and heavy demands of commercial fleet operations, the Truck-Lite 40203 features a high-impact polycarbonate lens and housing that are permanently vibration-welded (sonically sealed) together into a single piece. This airtight seal locks out fine cargo dust, moisture, and debris. Inside, the high-output single incandescent bulb is cradled by a specialized internal shock mount that absorbs rough road impacts and chassis rattles, drastically extending the service life of the filament.