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Good visibility means better safety. This Peterson clearance and side marker light is PC rated, giving you a 90-degree beam to either side for a total of 180 degrees of coverage. Mounted correctly, it works as both a clearance and side marker light—so other drivers can see you from the front, rear, or side. The red lens and incandescent 194 bulb give off a clear, bright signal that meets DOT standards for reliable road use.
Keeping your trailer compliant and visible shouldn't mean adding more parts. This light has a built-in reflex reflector molded right into the lens. You don’t need to install a separate reflector to meet safety requirements—it’s already taken care of. That means fewer parts to buy and one less thing to mount while still staying visible in low light.
Installing this light is quick and straightforward. It mounts with the included stud, so there’s no need for special brackets or extra hardware. The quick-connect wiring lets you just insert your stripped wire into the port for a secure fit—no crimping needed. There’s also an extra port for adding a ground if you’re mounting on a non-metal surface. Everything about the design is made for simple, solid installation.
Built to hold up through years of use, the premium incandescent bulb inside lasts up to 15,000 hours. It runs efficiently on 12V DC systems with only 0.25 amps of draw, keeping power demand low while giving consistent light output. The red screw-on lens protects the bulb from dirt and road grime, so it stays dependable wherever you take it.


Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.
Today we are looking at the Peterson Rectangular Trailer Light with Reflector, part number 423400. This mounts with a single stud, quarter inch in diameter. It has a 2,500 hour heavy duty bulb that is included. It comes with a replaceable reflective lens. This is a single wire system and grounds to the mounting stud.
Lets go ahead and hook it up to a power supply so you can see how it looks lit up. Now well go ahead and turn off the lights so you can see what it looks like in the dark. And there you have it for our Peterson Rectangular Trailer Light with Reflector, part number 423400.
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Brent
8/27/2017
1 year later and still working fine. Great price for the light.