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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 $55.99 - Original price $55.99
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    Pearl Blue 4" round 24 diode LED utility light in chrome housing

    Only 5 left!

    Need a great replacement for the utility lights in the back of your sleeper? Here ya go! This blue dual-function beauty is already built into a chr...

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    Original price $55.99 - Original price $55.99
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  • Original price $23.99 - Original price $23.99
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    Red 4" round 19 diode LED stop/turn/tail light w/reflector - CLEAR lens

    Only 10 left!

    This brake light is a great alternative to some of our more plain styles. It may not be as economical, but it's worth the extra bucks!Features: Lo...

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    Original price $23.99 - Original price $23.99
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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 7 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 $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 11 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 $28.99 - Original price $28.99
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    Maxxima White 4" round 9 diode LED backup reverse light

    Only 7 left!

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

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    Original price $28.99 - Original price $28.99
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    Blue 4" round 10 diode LED marker/turn signal light

    Only 2 left!

    We get a lot of requests for blue tail lights. They're not usually street legal, but a lot of drivers want them for auxiliary use on the back of th...

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    Original price $28.99 - Original price $28.99
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  • Original price $20.99 - Original price $20.99
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    Maxxima amber 4" round 9 diode LED dual-voltage turn signal light

    Only 7 left!

    This dual-function light has all of the perks you'd expect from Maxxima - bright diodes, reliable quality, plus a major bonus - it will function in...

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  • Original price $53.99 - Original price $53.99
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    Dual Revolution Amber/Green 4" round 19 diode LED park/turn/clearance light - CLEAR lens

    Only 1 left!

    Dual revolution technology. 19 Diodes and D.O.T compliant to auxiliary function ALL IN ONE - Clear Lens. Polycarbonate Lens resistant to cracks and...

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    Original price $53.99 - Original price $53.99
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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 $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

    12+ in stock

    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 $32.99 - Original price $32.99
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    White 4" round 12 diode LED back up/reverse light w/"mirror" surface

    Only 4 left!

    This is one of our most affordable options for an LED backup light - they have a tendency to cost upward of $60! These lights function at 12 volts.

    Original price $32.99 - Original price $32.99
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  • Original price $15.99 - Original price $15.99
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    Amber 4" round 19 diode LED park/turn/clearance light

    Only 6 left!

    Features: Grommet or flange not included. Has a built-in standard three-prong female plug in the back. These lights function at 12 volts. Features:...

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    Original price $15.99 - Original price $15.99
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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 $55.99 - Original price $55.99
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    Dual Revolution 4" round 19 diode LED Red stop/turn/tail and Amber STROBE light - CLEAR lens

    Only 4 left!

    This light has a standard three-prong offset female plug built into the back - this powers the normal stop/turn/tail red functions. There is an add...

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    Original price $55.99 - Original price $55.99
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  • Original price $72.99 - Original price $72.99
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    Dual Revolution Red/Blue 4" round 49 diode LED turn signal w/flange

    Only 11 left!

    This light is a stop/turn/tail and an auxiliary light, all in one housing! Using the standard three-prong offset plug, it will light up red and fun...

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    Original price $72.99 - Original price $72.99
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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

    Out of stock

    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 $31.99 - Original price $31.99
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    "Fleet" White 4" round 18 diode LED surface mount backup/reverse light w/Twist N Lock chrome bezel, plain wires (no plug)

    Only 8 left!

    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 $31.99 - Original price $31.99
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  • Original price $23.99 - Original price $23.99
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    Red 4" round 19 diode LED stop/turn/tail light w/reflector

    Only 12 left!

    Looking for a dependable light to dress up your truck or trailer? Look no further! This one's got everything you could want - great style, bright d...

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    Original price $23.99 - Original price $23.99
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  • Original price $35.00 - Original price $35.00
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    Flatline white 4" round 49 diode LED backup light

    Only 2 left!

    With a glistening chrome face, extremely bright diodes, and affordable price point, this reverse light has everything you could want! Pair it with ...

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    Original price $35.00 - Original price $35.00
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  • Original price $34.99 - Original price $34.99
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    Pearl 4" LED sleeper load light w/1156 plug - Blue - CLEAR LENS

    Only 6 left!

    This replacement load light is a great way to update the back of your sleeper. You'll increase your visibility, too. Most stock utility lights in t...

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    Original price $34.99 - Original price $34.99
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  • Original price $20.99 - Original price $20.99
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    Red 4" round 12 diode LED stop/turn/tail light with reflector - CLEAR lens

    Only 8 left!

    As much as we love and support our economy-priced line of tail lights, not everybody wants such a plain style. This flashy LED features 12 diodes, ...

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    Original price $20.99 - Original price $20.99
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    Red 4" round 12 diode LED stop/turn/tail light with reflector

    Only 11 left!

    Looking for a big visual impact that will be gentle to your wallet? Here's a light that will do the trick. The multifaceted interior design turns j...

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    Original price $20.99 - Original price $20.99
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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