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Clearance Lights & Marker Lights for Semi-Trucks and Trailers
Amber and red clearance and marker lights for semi-trucks, trailers, and commercial vehicles — DOT and FMVSS 108 compliant. This category covers the full range of federally required exterior identification lighting, including front and rear clearance lamps, side marker lamps, identification lamp bars, and PC-rated combination lights that satisfy both marker and clearance requirements in a single unit.
Round and oval housings make up the majority of the selection, with rectangular options and three-lamp ID bar assemblies also available. Most lights are grommet-mount, with flange-mount and surface-mount options in the mix. LED and incandescent options are stocked in 12V, with a selection of 24V and multi-voltage units for mixed-fleet applications. Brands include Automann, Betts, Grote, Peterson, Pro LED, and Truck-Lite.
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Frequently Asked Clearance & Marker Light Questions:
What clearance and marker lights are required on a semi-trailer?
Federal regulations under FMVSS 108 and 49 CFR 393 require trailers 80 inches or wider to have amber front clearance lamps, red rear clearance lamps, amber front side marker lamps, red rear side marker lamps, and three red identification lamps centered at the top rear. Trailers over 30 feet long also require intermediate amber side marker lamps at the midpoint of each side. All required lamps must be visible from at least 500 feet.
What is a PC-rated combination light?
A PC-rated light is a single lamp that satisfies both the marker light and clearance light requirements simultaneously. The "P" designates it meets the requirements for a parking or marker lamp, and the "C" designates it meets clearance lamp requirements. Using a PC-rated light simplifies installation by eliminating the need for separate marker and clearance lamps at the same location.
What's the difference between clearance lights and marker lights?
Clearance lights mark the outermost width and height of the vehicle — they define the edges. Marker lights indicate the presence and length of the vehicle as seen from the side. Both are required on trailers 80 inches or wider, must be amber on the front and sides, and red at the rear.
What are identification lights on a semi-truck?
Identification lights are the three amber lamps mounted in a row at the highest point at the front of a truck tractor, and the three red lamps centered at the top rear of trailers 80 inches or wider. They are required by 49 CFR 393 and must be spaced between 6 and 12 inches apart, center to center. Three-lamp ID bar assemblies combine all three lamps in a single housing for simplified installation.
Are LED clearance and marker lights DOT compliant?
Only if it's DOT-certified as a backup lamp. A general utility light may not meet the output, beam pattern, or certification requirements for a legally compliant backup lamp. If you need a replacement backup light, look for units specifically listed as backup or reverse lamps with DOT certification.
What does "multi-voltage" mean for truck lights?
Yes, provided the lamp carries the DOT certification marking on the lens. LED clearance and marker lights meeting FMVSS 108 requirements are legal replacements for incandescent lamps in the same application and are now the dominant choice for commercial vehicles due to their longer service life, lower current draw, and resistance to vibration and moisture.