6 Best Waterproof Trailer Lights For Horses That Prevent Common Issues

There’s nothing worse than hooking up the trailer an hour before dawn, only to find a brake light is out. You jiggle the bulb, check the connection, and waste precious time on a problem that was completely avoidable. For anyone hauling horses, trailer lights aren’t just a legal requirement; they are a critical piece of safety equipment that simply has to work every single time. Investing in the right waterproof, sealed lights is one of the smartest upgrades you can make to prevent these common, frustrating failures.

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Why Sealed Lights Prevent Common Trailer Failures

The number one killer of trailer lights is moisture. Traditional lights with removable bulbs and gasketed lenses are an open invitation for water, whether from a high-pressure wash-down, a heavy rainstorm, or just road spray kicked up on a wet day. Once water gets inside, it corrodes the bulb contacts, sockets, and wiring connections, leading to flickering or dead lights.

A sealed light solves this problem at its source. The entire unit—the circuit board, LEDs, and internal wiring—is fully encased in a waterproof housing. This is often done through sonic welding, which fuses the lens and housing into a single, impenetrable piece, or by potting the electronics in epoxy resin. There are no sockets to corrode or gaskets to fail.

This design makes them fundamentally more reliable. They are impervious to the vibration that can kill a fragile incandescent bulb filament and completely protected from the moisture that ruins the electrical contacts. A truly sealed light isn’t just "water-resistant"; it’s built to live in a wet, harsh environment for years without intervention. This means less time troubleshooting electrical gremlins and more confidence every time you tow.

Optronics GloLight LED: Superior Visibility & Seal

Optronics GloLight series stands out immediately because of its unique design. It features an outer ring of LEDs that serves as the running light, creating a distinctive, solid band of light that is incredibly visible from a distance. The center LEDs then light up brightly for the brake and turn signals, creating a clear, unmistakable signal for drivers behind you.

This separation of functions is a major safety advantage. In low-light or poor weather conditions, the "glow ring" makes the footprint of your trailer obvious without being blinding. When you hit the brakes, the sudden flash of the bright center lights is impossible to miss. It eliminates the ambiguity of some combination lights where the running light simply gets a little brighter for the brake.

Beyond visibility, these lights are built to last. They feature a sonically welded, polycarbonate construction that is fully sealed and submersible. This robust build quality ensures that moisture and vibration won’t compromise the internal electronics. For those who prioritize being seen and want a modern, highly effective light, the GloLight is a top-tier choice.

Bargman 84 Series: A Durable, Time-Tested Design

If you’re looking for a no-nonsense, reliable workhorse, the Bargman 84 Series is it. This classic rectangular design is a staple on horse trailers for a reason: it’s a proven performer. Many trailers come with this style from the factory, making the sealed LED version a perfect drop-in upgrade that eliminates the old bulb-and-socket problems.

The strength of the Bargman light is its rugged simplicity. The sealed LED units are built to withstand the rigors of farm use, from bumpy pasture roads to the occasional knock. They provide bright, reliable lighting without unnecessary frills. Their widespread use also means they are easy to find and fit standard mounting patterns.

While they may not have the cutting-edge look of some other models, their performance is undeniable. Upgrading to the sealed LED version of this light means you get modern reliability in a classic package. It’s the ideal choice for someone who wants to fix their light problem once and for all with a trusted, time-tested solution.

MaxxHaul Submersible Kit for Frequent Wash-Downs

For trailers that earn their keep and get dirty, frequent washing is a necessity. Whether you’re hosing out manure or blasting off mud, that water is the enemy of your electrical system. This is where a truly submersible light kit, like those from MaxxHaul, proves its worth.

These lights are specifically engineered to be completely waterproof, often using a "bell jar" principle where the electronics are sealed in an inner chamber, or by being fully potted in epoxy. This isn’t just marketing speak; a submersible rating means the light can be fully underwater and continue to function perfectly. This level of protection is exactly what you need to withstand direct, high-pressure spray during clean-out.

Many MaxxHaul products are sold as complete kits, including tail lights, clearance lights, and a wiring harness. This is a huge advantage if you’re overhauling an older trailer with a questionable electrical system. By replacing everything at once with a system designed to be waterproof from end to end, you eliminate all the potential points of failure in one go.

Wesbar Low Profile Lights Resist Kicks and Damage

Trailer lights live in a high-impact zone. They can get snagged on gate posts, backed into fences, or even kicked by a fractious horse during loading. A shattered lens or cracked housing is a common and frustrating repair. Wesbar’s low-profile and wraparound lights are designed specifically to mitigate this type of physical damage.

By sitting closer to the trailer body, these lights present a smaller target. Wraparound designs that curve around the corner of the trailer are even better, as they have no hard edge to catch on an obstacle. This seemingly small design choice can be the difference between a close call and a broken light.

This makes them an excellent choice for anyone with a ramp-load trailer, where horses are in close proximity to the lights, or for those who maneuver their trailer in tight spaces. While still providing excellent visibility, their primary advantage is their durable, damage-resistant shape. Choosing a light that is less likely to break in the first place is a smart, practical decision.

CURT LED Combination Lights for Towing Confidence

CURT is a name synonymous with towing, and their lighting products reflect that deep expertise. They understand that a trailer light is part of a larger system that needs to be absolutely dependable. Their sealed LED combination lights are built with the durability required for real-world hauling.

One of their key advantages is the use of surface-mount diode (SMD) technology. Unlike older LEDs with leads that pass through the circuit board, SMDs are mounted directly to the surface. This makes them inherently more resistant to the constant shock and vibration a horse trailer endures on the road, leading to a longer, more reliable service life.

When you choose a CURT light, you’re buying into an ecosystem of quality towing gear. Their lights feature fully sealed, weatherproof housings and tough polycarbonate lenses. This robust construction provides the kind of towing confidence that lets you focus on your animals and the road ahead, not on whether the driver behind you can see your brake lights.

Partsam Sealed LED Kit: A Complete Rewire Solution

Sometimes, one bad light is a symptom of a much larger problem: a rotted, corroded wiring harness. If you’re facing flickering lights all over your trailer, a complete rewire is often the best path forward. Partsam offers affordable, all-in-one sealed LED kits that make this daunting task manageable.

These kits are the definition of value. They typically include everything you need for a full electrical overhaul: two combination tail lights, multiple clearance and marker lights, a license plate light, and a brand-new wiring harness with connectors. This allows you to rip out the entire old system and replace it with fresh, sealed components.

While they may not have the premium feel of a brand like Optronics, they are a massive upgrade over old, failing incandescent systems. For an older stock trailer or a utility trailer that needs to be made safe and legal without a huge investment, a Partsam kit is an incredibly practical and effective solution. It addresses the entire problem, not just one symptom.

Choosing Your Lights: Key Features for Longevity

Ultimately, the best light for your trailer depends on your specific situation. A weekend-use trailer has different needs than one that’s on the road daily or gets washed constantly. Instead of focusing just on brand, pay attention to the key features that ensure a light will last.

When you’re comparing options, look for these specific characteristics. Each one contributes directly to a longer service life and greater reliability.

• Truly Sealed Housing: Look for terms like "sonically welded" or "potted in epoxy." These are far superior to a simple gasket, which can dry out and fail over time.
• LED Technology: This is a non-negotiable. LEDs are brighter, use less power, last tens of thousands of hours longer, and are highly resistant to vibration that shatters incandescent filaments.
• Polycarbonate Lens: Make sure the lens and housing are made from polycarbonate, not acrylic. Polycarbonate is significantly more impact-resistant and less likely to crack or shatter.
• Submersible Rating: If you ever pressure wash your trailer or back it down a boat ramp, a submersible rating is essential. It’s the highest level of water protection available.
• Damage-Resistant Profile: If your trailer operates in tight quarters or you’ve broken lights before, strongly consider a low-profile or wraparound design to minimize the risk of physical damage.

The goal is to install a set of lights and then forget about them. Investing a little more upfront for a high-quality, fully sealed LED unit saves you countless headaches down the road. It’s a simple upgrade that pays for itself in reliability and peace of mind.

Your trailer’s lights are your most important communication tool on the road, signaling your intentions to everyone around you. Choosing a robust, sealed, and waterproof LED system isn’t an expense; it’s a critical investment in the safety of you, your horses, and other drivers. Make the switch and eliminate one of the most common points of failure, so you can tow with confidence.