Long-Term Value of Aluminum and Bronze Navigation Lights

In coastal environments, durability is everything. Navigation lights installed on fixed-span and movable bridges are constantly exposed to the harsh effects of saltwater spray, strong winds, and relentless UV radiation. Historically, plastic light fixtures have struggled to withstand these conditions. Despite advancements in marine-grade plastics and protective coatings, plastic fixtures often degrade—leading to fading, corrosion, and increased risk of electrical failure.

While some plastic products may last between 5 and 15 years, their total cost of ownership remains significantly higher over time due to recurring replacements and maintenance. Even with coatings, plastic can’t match the resilience of aluminum or bronze castings. That’s why many State Departments of Transportation (DOTs) are making the shift to aluminum and bronze fixtures.

At B&B Roadway, we’ve been fabricating high-performance navigation light housing for over 70 years. Our cast aluminum and bronze fixtures are trusted across the U.S., and some have been in continuous service for over four decades with only routine maintenance of internal components. It’s not just the engineering—it’s the quality of the casting that ensures longevity and reliability.

Aluminum, depending on application and upkeep, can last up to 75 years. Bronze goes even further, offering unmatched corrosion resistance and stability in the most punishing saltwater conditions.

In fact, one state DOT recently committed to phasing out all plastic fixtures in favor of our bronze navigation lights—prioritizing safety, performance, and long-term value. When it comes to marine infrastructure, material selection isn’t just a choice—it’s an investment in safety and sustainability.

B&B Roadway offers aluminum and bronze navigation lights available for any movable and fixed-span bridge project.