HELLA 2378 12/24V LED Combo Lamp Slim Design

HELLA 2378 12/24V LED Combo Lamp Slim Design

Slim-profile LED combination lamp delivering stop, tail, and indicator functions in a single compact 222 x 96 x 25mm unit, with IP67/IP69K dual-rated protection, dual ADR compliance, horizontal and vertical mounting capability, and 5-year warranty for trucks, trailers, and heavy commercial vehicles on 12/24V systems.

Product Overview

The HELLA 2378 is a slim-design LED combination lamp integrating stop, tail, and indicator lighting functions into a single low-profile unit for trucks, trailers, and heavy commercial vehicles. At just 25mm deep, the 2378 is purpose-built for applications where mounting depth is restricted or a clean, low-protrusion rear lighting profile is required, including curtainsider trailers, refrigerated bodies, flat panel rear structures, and flush-mounted trailer lighting applications. The 2378 is dual ADR compliant, meeting ADR 49/00 for stop and tail lamp functions and ADR 6/00 Category 2 for the indicator function, confirming full road-legal compliance for rear combination lighting on heavy vehicles operating on Australian roads. IP67 and IP69K dual ingress protection ratings confirm the 2378 is both submersion resistant and capable of withstanding high-pressure washdowns, making it fully suited to the exposed rear panel environments of trailers and truck bodies subject to rain, road spray, and pressure cleaning. The shockproof construction provides additional resistance against the vibration and physical impacts common in heavy transport operation. Supplied with mounting bushes and pre-wired for straightforward installation, the 2378 can be mounted in both horizontal and vertical orientations to accommodate different trailer and body panel configurations. The 193mm centre-to-centre mounting distance and rectangular 222 x 96mm footprint suit standard rear panel and trailer tailgate mounting positions. Universal 12/24V input covers the full range of heavy truck and trailer electrical systems in a single unit, and HELLA's five-year warranty provides long-term confidence for fleet operators, trailer manufacturers, and transport companies.

Features & Benefits

Slim 25mm Profile: At just 25mm deep, the 2378 delivers full stop, tail, and indicator combination lamp functionality in one of the lowest-profile rear combination units available, ideal for flush mounting on curtainsider trailers, refrigerated bodies, and rear panels where mounting depth is restricted.

Three Functions in One Unit: Combines stop, tail, and indicator functions into a single LED combination lamp, reducing the number of individual lights required on the rear panel, simplifying wiring, and providing a cleaner finished installation compared to fitting separate units for each function.

Dual ADR Compliance: Meets ADR 49/00 for stop and tail lamp functions and ADR 6/00 Category 2 for the indicator function, confirming full road-legal compliance for rear combination lighting on heavy vehicles operating on Australian public roads.

IP67 and IP69K Dual Rated: Full submersion protection combined with high-pressure washdown resistance provides the highest available ingress protection standard for rear combination lamps, ensuring reliable operation through rain, road spray, and pressure cleaning of trailer bodies and truck rear panels.

Shockproof Construction: Built to withstand the vibration and physical shock typical of heavy transport operation, including rough road surfaces, loading dock impacts, and the sustained vibration of long-haul trucking without compromising LED connections or optical performance.

Horizontal and Vertical Mounting: Supports both horizontal and vertical installation orientations, providing flexibility to suit a wide range of trailer body panel configurations, rear door frames, and flat panel mounting positions.

Supplied with Mounting Bushes: Mounting bushes included in the box simplify installation and provide a secure, vibration-dampening fitment onto trailer rear panels and body frames without requiring additional hardware.

Pre-Wired Connector: Factory-fitted pre-wired connector eliminates the need for additional connectors at the lamp unit, simplifying connection into the trailer or vehicle rear wiring loom.

12/24V Universal Input: Single lamp compatible with both 12V light commercial vehicles and 24V heavy trucks and trailers, eliminating the need for separate voltage variants across mixed fleets.

HELLA 5-Year Warranty: Backed by HELLA's five-year warranty, providing long-term confidence for fleet operators, trailer manufacturers, and transport companies specifying quality lighting for extended service life.

Technical Specs

Compatible With / Goes Well With

The HELLA 2378 is suited to any 12V or 24V truck, trailer, or heavy commercial vehicle requiring a slim-profile ADR-compliant rear combination lamp. Primary applications include curtainsider and tautliner trailers with restricted rear panel depth, refrigerated and box body trailers with flush rear door frames, flatbed and drop-deck trailers, tipper bodies and tipping trailers, rigid trucks and bus bodies with slim rear lighting requirements, car carriers, livestock trailers, and heavy plant transport trailers where a low-protrusion rear combination lamp is required.

Pairs well with other HELLA truck and trailer lighting products including the 2051BULK amber front marker pack, 2053BULK red/amber side marker pack, 2054BULK clear front marker pack, 2026BULK cab marker pack, and 2307BULK rear marker light for a complete matched HELLA rear lighting solution. Also pairs well with reverse lamps and reverse alarms, trailer wiring looms and junction boxes, and waterproof cable connectors and heat-shrink terminals for professional rear lighting installations.

Frequently Asked Questions

What lighting functions does the HELLA 2378 provide in a single unit?

The 2378 combines three rear lighting functions into a single slim unit: stop lamp, tail lamp, and indicator. This eliminates the need to fit separate individual lamps for each function on the rear panel, reducing wiring complexity and the number of mounting holes required while providing a cleaner, more integrated finished appearance on trailer and truck rear panels.

What does dual ADR compliance mean on the 2378?

The 2378 carries two separate ADR compliance certifications covering its different light functions. ADR 49/00 covers the stop and tail lamp functions, confirming they meet the legal output and visibility requirements for those functions on heavy vehicles. ADR 6/00 Category 2 covers the indicator function. Together, these confirm the 2378 is fully road-legal as a rear combination lamp on trucks and trailers operating on Australian public roads.

Can the 2378 be mounted in both horizontal and vertical orientations?

Yes. The 2378 supports both horizontal and vertical mounting orientations, providing flexibility to accommodate different trailer body panel layouts, rear door frame configurations, and flat panel mounting positions. Mounting bushes are supplied with the unit to assist with secure installation in either orientation. Confirm the intended orientation suits the ADR visibility angle requirements for the specific vehicle type and mounting position.

What is the difference between IP67 and IP69K ratings on the 2378?

IP67 certifies the lamp can withstand temporary water immersion up to 1 metre depth, while IP69K certifies protection against high-pressure, high-temperature water jets at close range. Carrying both ratings simultaneously confirms the 2378 is protected against both water submersion and the high-pressure washdowns commonly used to clean trailer bodies, refrigerated units, and truck rear panels in transport and agricultural operations.

Is the 2378 suitable for replacing older incandescent combination lamps on existing trailers?

Yes. The 2378 is well suited for retrofitting onto existing trailers and truck bodies as a direct upgrade from incandescent or older LED combination lamps, provided the rear panel has sufficient space to accommodate the 222 x 96mm footprint and the wiring can be adapted to the pre-wired connector. The 193mm centre-to-centre mounting distance should be confirmed against existing mounting holes before installation. A qualified auto electrician is recommended for retrofitting combination lamp wiring on heavy vehicles.