Truck-Lite 80604 – 12V 20W Incandescent Replacement Bulb (Multi-Purpose for Dome, Utility & Turn Signal Lighting)

Restore Dependable Internal and External Fleet Lighting 

Keep your commercial truck cabins bright and your exterior signals working safely with the Truck-Lite 80604 Incandescent Replacement Bulb. Precision engineered by Truck-Lite—a trusted global standard in heavy-duty commercial vehicle visibility—this 20-watt replacement bulb delivers reliable, steady illumination. Operating on a standard 12V DC platform, it serves as an essential fleet maintenance component to keep both your interior workspace and outer warning systems fully compliant with highway regulations.

Universal Multi-Purpose Vehicle Application 

The Truck-Lite 80604 is a highly versatile, multi-purpose bulb designed to cross over multiple vehicle lighting systems. It serves as an exact factory-recommended replacement bulb for popular Truck-Lite dome and utility light housings (including the 20302 to 20308 series), as well as dedicated amber turn signal lamps (such as the 20309Y and 20310Y/20310C assemblies).

Engineered-In Durability for Heavy-Duty Work Cycles 

Vocational fleets, delivery vans, and long-haul trucks endure constant physical jarring, road vibrations, and severe thermal cycles that cause off-the-shelf bulbs to fail prematurely. Backed by years of performance testing under harsh operating conditions, this premium incandescent bulb features an optimized internal filament structure capable of handling severe-duty environments. Emitting a clear 20 candlepower light intensity while drawing a manageable 1.55 Amps, it offers a cost-effective alternative to replacing entire lamp fixtures, maximizing your fleet uptime and stretching your budget.