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What you get in this 10-pack

The 10x Smoked White 3/4" Bullet Round LED Side Marker Lights are 19mm (3/4") bullet lamps for trailers, trucks, and RVs. Each unit runs an SMD 2835 chipset across a 9 to 32V DC range, so one SKU covers 12V legacy trailers and 24V commercial platforms. Koeep SKU: BULLET-WHT-10PK-1925.

The smoked-white polycarbonate lens hides the diodes when off and throws a crisp 6000K to 6500K white when powered. Rated output is ≥4.0 cd on the H-V axis, above the SAE J592 minimums for both PC (side marker) and PC* (clearance) functions.

In the box

• 10× marker light assemblies
• 10× 304 stainless mounting nuts with nylon locking inserts
• 10× neoprene body gaskets (60 Shore A)
• 1× installation torque card (1.8 N·m)

Leads are pre-tinned for 18 to 22 AWG wire. The spec calls for adhesive-lined heat-shrink butt connectors, which are not included.

Compliance and materials

These lamps are built against the 2026 regulatory stack: FMVSS 108, CMVSS 108, and ECE R148 (Class A side-marker, white). Photometric output is validated to SAE J592:2025 Table 2 and FMVSS 108 (49 CFR §571.108, Table I-a).

The housing is 6063-T6 aluminum with MIL-A-8625 Type II sulfuric anodizing. Ford's 2026 Super Duty platform calls for aluminum-compatible lighting to prevent bimetallic corrosion, and this unit meets that with a 304 stainless mounting stud plus a nylon-6 isolation washer. The threaded mount also avoids galvanic corrosion on aluminum-intensive 2026 trailer frames.

The lens is SAE J576 Class A UV-stabilized polycarbonate with a co-molded UV absorber (≥2.5% Tinuvin 326 equivalent) that resists hazing through 2030. Thermal management runs through a copper-core MCPCB with a 1.6mm FR-4 dielectric, holding junction temperature below 85°C at 24V continuous operation.

Key numbers

DTC mapping for 2026 trailer modules

2026 trucks monitor trailer lighting circuits continuously through body control modules and dedicated trailer modules. Each marker here carries a built-in load-emulation circuit that holds the resistive signature those modules expect. That clears the usual LED conversion codes, including B3882 through B3888, C1113 to C1119, and P0650-related trailer module faults.

The PWM driver is CAN-transparent on CAN FD and CAN XL (ISO 11898-1:2024) and injects nothing onto the bus. That covers 2026 Ford, GM, and Toyota trailer modules, including the F-350 Super Duty Pro Trailer Backup Assist, Silverado 3500HD Advanced Trailer System, Tundra i-FORCE MAX, and Cybertruck digital lighting architecture.

How it compares to what you're replacing

Most marker retrofits swap 194-series incandescent bulbs or budget COB units. Here is where they fall short against this light.

Where white markers are legal

Under 49 CFR Part 393.11, commercial trailers need one amber (front) and one red (rear) marker per side below 30 ft, and two amber plus two red per side at 30 ft or more. These white lamps are approved for intermediate side marker positions on trailers ≥30 ft, used alongside the required amber and red markers. Match your layout to FMVSS 108 Table I-a for your trailer length and GVWR class.

Ordering and support

Get the 10-pack on koeep.com

More parts while you're here

Tackling a bigger repair list? The same store carries trim and cab electrics, for example a pair of front bumper lower side grilles for the 2011-2014 BMW X3 F25 and a passenger side master power window door switch 56009451AC for the Jeep Cherokee.

For another install walkthrough with fitment and compatibility notes, read the guide to the VW Golf MK7 electric window control switch 5G0959855G. Both pages sit in the same auto and motorcycle parts catalog.

FAQ: 2026 trailer lighting faults and fixes