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4" Round LED Turn Signal Lights

4" round LED lights are commonly used as front/turn/clearance lights or stop/turn/tail lights. They can be mounted in either a rubber grommet or a metal safety flange. Most every truck on the road has a ton of these, on their mudflap hangers, rear center panel, bumper, or even on their trailer.


All lights in our stock are made to function with 12-volt systems. However, we also carry many multi-voltage and 12/24-volt styles. See our 24-volt LED lights page for more information.

  • Original price $14.99 - Original price $14.99
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    "Fleet" Red 4" round 18 diode LED stop/turn/tail light

    12+ in stock

    As the name implies, these Fleet lights are economically priced, but high-quality - perfect for outfitting a large number of trucks without bankrup...

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    Original price $14.99 - Original price $14.99
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  • Original price $15.99 - Original price $15.99
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    Red 4" round 19 diode LED stop/turn/tail light

    12+ in stock

    These turn signals are a customer favorite. We've sold them two at a time, and we've sold them twenty at a time! They have the most diodes of any 4...

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    Original price $15.99 - Original price $15.99
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  • Original price $12.99 - Original price $12.99
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    Red 4" round 8 diode LED stop/turn/tail light

    12+ in stock

    Looking for a simple, uncomplicated tail light? This style is a great option for drivers who like a classic look, rather than one of our more moder...

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    Original price $12.99 - Original price $12.99
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  • Original price $20.99 - Original price $20.99
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    "Fleet" Red 4" round 18 diode LED stop/turn/tail light w/GROTE PLUG

    12+ in stock

    This version of the "Fleet" LED turn signal has a built-in Grote 3-pin plug in the back. This is the round plug with evenly spaced pins, not the mo...

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    Original price $20.99 - Original price $20.99
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  • Original price $19.99 - Original price $19.99
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    "Mirage" Red 4" round 24 diode LED stop/turn/tail light

    Only 10 left!

    The unique "Mirage" series turn signals feature a ring of LED light around the outer edge, with a center "tunnel" visual effect that makes the ligh...

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    Original price $19.99 - Original price $19.99
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  • Original price $22.99 - Original price $22.99
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    "Halo" Red 4" round LED stop/turn/tail light

    Only 12 left!

    What looks like a normal, grommet-mount tail light is anything but! The glowing outer "Halo" acts as a soft but fully-functional marker light, then...

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    Original price $22.99 - Original price $22.99
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  • Original price $16.99 - Original price $16.99
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    Maxxima red 4" round 9 diode LED stop/turn/tail light

    12+ in stock

    We featured this light in Chrome Time Webisode 3.Features: Fits any standard 4" rubber grommet or mounting flange. Built-in three-prong female plug...

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    Original price $16.99 - Original price $16.99
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  • Original price $22.99 - Original price $22.99
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    Maxxima red 4" round 32 diode LED stop/turn/tail light

    12+ in stock

    This light requires the use of either a rubber grommet or mounting flange.This light has a built-in three-prong female plug in the back.These light...

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    Original price $22.99 - Original price $22.99
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  • Original price $18.99 - Original price $18.99
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    "Fleet" Red 4" round 18 diode LED surface mount stop/turn/tail light w/Twist N Lock chrome bezel, 3 wires (no plug)

    12+ in stock

    This is not a grommet mount light. It is a surface mount light, perfect for applications like replacing the load lights in the back of your sleeper...

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    Original price $18.99 - Original price $18.99
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  • Original price $34.99 - Original price $34.99
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    Grote SuperNova Red 4" round 10 diode LED stop/turn/tail light

    Only 11 left!

    Original price $34.99 - Original price $34.99
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  • Original price $14.99 - Original price $14.99
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    Red 4" round 10 diode LED stop/turn/tail light

    Only 10 left!

    This light requires the use of either a rubber grommet or mounting flange.This light is hard-wired with one three-prong female plug, connected to t...

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    Original price $14.99 - Original price $14.99
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  • Original price $27.99 - Original price $27.99
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    Red 4" round 17 "super diode" LED stop/turn/tail light

    Only 3 left!

    Trux has brought their massively popular pedestal turn signal to a grommet-mount style turn signal. Their "super diode" line of lights features 8mm...

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    Original price $27.99 - Original price $27.99
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  • Original price $18.99 - Original price $18.99
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    "Fleet" Red 4" round 18 diode LED stop/turn/tail light w/Twist N Lock chrome plastic bezel - flange mount, 3 prong pigtail

    Only 5 left!

    This is a flange mount light - no grommet required. The twist-on chrome bezel hides the mounting holes. Mounting hardware not included. It has a bu...

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    Original price $18.99 - Original price $18.99
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  • Original price $46.95 - Original price $46.95
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    Flatline Red 4" round flange mount 49 diode LED turn signal

    Only 1 left!

    This is a perfect light for the back of your sleeper, to replace the existing load lights. The flush-mount installation makes it a great match for ...

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    Original price $46.95 - Original price $46.95
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  • Original price $26.99 - Original price $26.99
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    Maxxima Red 4" round 44 diode LED stop/turn/tail light

    Only 9 left!

    If you want a little more sparkle than our economy lights but you still don't want to spend your entire budget, these 44 diode lights make a great ...

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    Original price $26.99 - Original price $26.99
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  • Original price $28.95 - Original price $28.95
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    Red 4" round 26 diode Smart Dynamic 3-in-1 LED turn signal light

    Only 1 left!

    This Smart Dynamic light is the first sequential turn signal to also function as a tail light and brake light! The built-in Smart Chip technology a...

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    Original price $28.95 - Original price $28.95
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  • Original price $51.99 - Original price $51.99
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    Flatline Red 4" round 49 diode LED turn signal

    Only 3 left!

    This is one of the most classic Flatline LED lights. The chrome face combined with the red diodes give it a very unique look, day or night.Electric...

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    Original price $51.99 - Original price $51.99
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  • Original price $18.99 - Original price $18.99
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    Maxxima red 4" round 9 diode LED dual-voltage stop/turn/tail light

    12+ in stock

    This light is a dual-voltage version of our SKU #11838, shown as a related item. It will work in both 12- and 24-volt systems, with no additional w...

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    Original price $18.99 - Original price $18.99
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    Current price $18.99
  • Original price $11.99 - Original price $11.99
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    $11.99
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    Current price $11.99

    Red 4" round 19 diode LED stop/turn/tail light

    12+ in stock

    Looking for a simple, uncomplicated tail light? This style is a great option for drivers who like a classic look, rather than one of our more moder...

    View full details
    Original price $11.99 - Original price $11.99
    Original price
    $11.99
    $11.99 - $11.99
    Current price $11.99