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Marker Lights for Trucks & Trailers

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Marker Lights for Trucks & Trailers (UK Guide)

A practical guide to choosing the right marker lights for trucks, trailers, and commercial vehicles.

What Are Marker Lights?

Marker lights are essential safety lights fitted to commercial vehicles such as trucks and trailers to improve visibility and support compliance with UK road regulations. They help indicate the size, position, and outline of a vehicle, particularly in low-light conditions, poor weather, or when operating on busy roads.

For fleet operators, installers, and commercial vehicle owners, choosing the right marker lights helps improve road visibility, reduce downtime, and maintain a professional vehicle finish.

Types of Marker Lights

Different applications require different styles, sizes, and mounting options, so it is worth choosing lights based on both compliance needs and vehicle type.

Choosing the Right Marker Lights

When choosing marker lights, consider the following:

  • Vehicle type – truck, trailer, refuse vehicle, or crane truck
  • Mounting position – side, front, rear, or end-outline
  • Voltage compatibility
  • Lens colour requirements
  • Weather resistance and durability
  • Relevant compliance standards

If you are unsure where to start, browsing by vehicle type or colour can help narrow down the best option for your application.

Why Choose LED Marker Lights?

LED marker lights are brighter, longer-lasting, and more energy-efficient than traditional bulb options. They are a popular choice for commercial vehicles because they help reduce maintenance while improving visibility on the road.

For operators who want durability and lower running costs, LED marker lights are often the best long-term option.

How to Find the Right Marker Lights for Your Vehicle

The best way to find the right marker lights is to match the product to your vehicle type, mounting position, and required lens colour. Truck and trailer setups may differ, and some applications will require specific sizes, brackets, or end-outline fittings.

You can also browse by vehicle type and colour to explore suitable options for your installation and quickly compare products.

Where Are Marker Lights Used?

Marker lights are used across a wide range of commercial and specialist vehicles to improve visibility and meet safety regulations.

  • Trucks & HGVs – side marker lights and clearance lights for visibility
  • Trailers – rear and side markers to meet legal requirements
  • Recovery Vehicles – enhanced visibility in roadside situations
  • Refuse & Municipal Vehicles – safety lighting in urban environments
  • Construction Vehicles – improved visibility on-site and on roads

Frequently Asked Questions

Common questions about marker lights for trucks and trailers.

Are marker lights required in the UK?

Certain commercial vehicles are required to use marker lights to help meet visibility and road safety requirements. The exact lighting setup depends on vehicle type, size, and application.

What colour marker lights should I use?

Amber marker lights are generally used on the side of the vehicle, red marker lights at the rear, and white marker lights at the front. Always check the correct application and legal requirements for your vehicle.

Are LED marker lights better?

In most cases, yes. LED marker lights are typically brighter, more energy-efficient, and longer-lasting than traditional bulb alternatives, making them a strong choice for commercial vehicles.

What are end-outline marker lights used for?

End-outline marker lights are used to help define the outer edges of larger vehicles. They make the width and height of the vehicle easier to see, especially in poor visibility or at night.

What is the difference between marker lights and side lights?

Marker lights are used to show the size, position, or outline of a vehicle, while side lights are generally part of the vehicle’s standard lighting system. The exact use can vary depending on the application and vehicle type.

Are LED marker lights road legal in the UK?

LED marker lights can be road legal in the UK when correctly specified and fitted for the right application. It is important to choose suitable products and ensure they are installed in line with applicable vehicle lighting requirements.

Where should marker lights be fitted on a trailer?

Marker lights can be fitted at the side, front, rear, or as end-outline lights, depending on the trailer design and visibility requirements. Placement should always suit the intended use and relevant regulations.

What voltage marker lights do I need?

The correct voltage depends on your vehicle’s electrical system. Always check the product specification and match the marker light to your vehicle’s required voltage before installation.

How do I choose the right marker light for my vehicle?

Start by checking the mounting position, required lens colour, voltage, size, and installation method. You should also consider visibility, durability, and whether LED is the best option for your application.

Popular Marker Light Brands

The WAŚ W105 series comprises a versatile range of LED position and clearance lamps engineered for commercial vehicles, trailers and specialist applications. Designed for universal 12 V–24 V operation, the lamps provide reliable outline, front and rear position lighting using long-life LED technology.

The series includes variants with different mounting configurations such as surface-mount, flat hinge and angled hinge versions, allowing installation on body edges, vehicle frames and narrow structural areas. All models are supplied with pre-wired cabling and feature sealed lamp housings offering strong resistance to water and dust ingress.

W105 lamps provide bright, uniform output with minimal energy consumption, ensuring dependable visibility and compliance with vehicle lighting regulations. Their robust construction makes them suitable for demanding working environments including transport fleets, agricultural machinery and utility vehicles.

The WAŚ W109N series delivers a comprehensive range of LED side-marker and position lamps engineered for universal 12 V-24 V vehicle systems. Featuring durable sealed housings rated to IP66/68, these units are suitable for front, side or rear mounting in professional vehicle environments.

Variants in the series include the 765, 766 and 767 models (and their “-Jxx” cable length variants) offering flexible mounting configurations, cable options and voltage compatibility. The series supports mounting on trailers, vans, trucks and other commercial vehicles where robust, efficient LED lighting is required.

Each lamp delivers low-profile, efficient illumination with a standard fly-lead cable and universal voltage range for streamlined installation and logistics. With E-marking and high ingress protection, the W109N series is designed to meet the demands of fleet, trailer and specialist lighting environments.

The WAŚ W115 series comprises slim LED marker lamps designed for commercial vehicles and trailers requiring modern outline and marker lighting. Each lamp combines LED position lighting with an integrated reflex reflector, reducing component count while improving visibility and styling.

All W115 models share a compact profile approximately 238 mm long, 20 mm high and 10 mm deep with 213 mm fixing centres, enabling easy surface mounting on body sides, rear frames or bumpers. A 38 cm pre-wired cable is standard, and the fully sealed housings are rated to IP66/68 for resistance to water and dust in demanding on-road environments.

The range includes front (826 W115, white), side (824 W115, amber) and rear (825 W115, red) marker variants, all suitable for 12–24 V systems. This makes the W115 series a flexible solution for complete vehicle outline lighting, from small trailers to heavy commercial vehicles.

The WAŚ W122N series consists of compact LED marker lamps engineered for side and position lighting on commercial vehicles, trailers, utility bodies and agricultural machinery. Designed for universal 12 V–24 V operation, each model delivers reliable, energy-efficient illumination suitable for continuous use.

The lamps feature fully sealed housings rated to IP66/68, ensuring resistance to water, dust and road contamination. Their slim, unobtrusive construction allows straightforward mounting on vehicle sides, outlines or structural frame points. Pre-wired cabling provides quick connection into vehicle harness systems, supporting efficient installation and long-term dependability.

Built around long-life LED modules, the W122N series offers stable light output with minimal maintenance requirements. These lamps are ideal for fleet operators, coachbuilders and OEM installations requiring durable marker lighting that performs consistently in demanding vehicle environments.

The WAŚ W125d series provides professional-grade multi-function LED rear combination lamps designed for use on trailers, commercial vehicles, agricultural machinery and utility bodies. Each unit supports universal voltage operation (12 V-24 V) and includes functions such as stop light, tail light, direction indicator, rear-fog lamp, reversing light and reflex reflector, all within one integrated housing.

The series features a variety of left-hand and right-hand models with standard or IP66/68 rated housings. Cable lengths and connector options can be specified; the manufacturer lists alternative plug types (e.g., TYCO, Schlemmer, WAŚ 5-pin or 7-pin) on request. The robust sealed construction ensures long-term performance in road-spray, salt, dust and moisture-rich environments.

WAŚ W125d lamps are E-marked and designed to meet multiple ECE approvals for rear lighting, making them suitable for demanding fleet, trailer or bodybuilder installations where a single lamp provides full rear-light functionality.

The WAŚ W131 series comprises round LED rear combination lamps designed for commercial vehicles, trailers and specialist builds requiring compact, modern rear lighting. Each unit provides core rear-light functions including stop, tail and direction indicator, delivered through a distinctive multi-segment LED layout.

The lamps in this series operate on universal 12–24 V systems and utilise sealed housings rated to IP66/68 for protection against water, dust and road contamination. Their low-profile design with concealed screw mounting ensures a clean appearance once installed, while the robust LED modules offer long service life and reduced maintenance.

Suitable for bodybuilders, trailer manufacturers and upgrade applications, the W131 range delivers reliable, high-visibility lighting performance in a compact round format that integrates easily into rear panels or recessed body apertures.

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