Save 12%
T15 921 Canbus Projector LED Reverse Light Bulbs, Extremely Bright White High-Power (PAIR)
T15 921 Canbus Projector LED Reverse Light Bulbs, Extremely Bright White High-Power (PAIR) 6000K White
T15 921 Canbus Projector LED Reverse Light Bulbs, Extremely Bright White High-Power (PAIR)
T15 921 Canbus Projector LED Reverse Light Bulbs, Extremely Bright White High-Power (PAIR) 6000K White
T15 921 Canbus Projector LED Reverse Light Bulbs, Extremely Bright White High-Power (PAIR)
Availability: Many in stock

T15 921 Canbus Projector LED Reverse Light Bulbs, Extremely Bright White High-Power (PAIR)

$ 34.99 $ 39.99 $ 39.99 /

Select an option to add this to your cart


T15 921 LED Reverse Light Bulb – Product Overview and Description

The Underground lighting T15 921 LED Reverse Light bulb is manufactured with four side illumination and a projector lens on top increasing the overall brightness. The aluminum housing distributes heat evenly to maximize the lifespan of the bulb. And the best part is that these projector LED reverse light bulbs are plug and play so installation is quick and simple.

Illumination. All Underground Lighting LEDs are rated with accurate lumen figures, never calculations or guesses. We test the true output and provide you with real numbers to compare. At 1000 lumens, the Underground Lighting white backup LED will provide more total light output than a factory incandescent bulb.

Dependability. Unlike other bulbs on the market, this bulb is built with the latest updated aluminum circuit board for quick heat dissipation and better-LED chip protection to ensure durability. This 921 LED reverse light bulb will last for years, rather than months, with no flickering or failure. And like every Underground Lighting product, it's backed by our industry-leading two-year replacement warranty.

Expertise. After over a decade in business, Underground Lighting is one of the most trusted names in automotive lighting. We design and manufacture all of our own products to meet our strict quality standards. We pride ourselves on having a knowledgeable staff to deliver superior service that will exceed your expectations. Please contact us if you'd like to discuss your lighting needs.

  • Direct replacement for factory incandescent 921 T15-size for the tail light bulb and or turn signals.
  • 12 3030 SMD type LED with a 5 high-power chip mounted at the top.
  • Full metal heatsinking for reliable operation.
  • Nonpolar and CK compatible electrical design.
  • Increased output with LED appearance.
  • Plug and play, simple installation, No Errors.
  • 500 lumens per bulb.


[tabs][tab title="Warranty"] This product comes with a 2 year warranty.  [/tab][/tabs]


This product comes with a 2 year warranty. 


Frequently Asked Questions on LEDs

Which Color Is Best for Headlight Bulbs?

The best color for your headlight bulbs is white. You want to find a bulb around the range of 6000k in color temperature. The human eye reads this color and brightness better due to its similarity to natural sunlight.

That said, the best color for your headlights can be subjective. LEDs are also available in yellow, blue, and purple. Each color will work just fine on the roads and give your car a more distinctive look than the traditional white color.

Will LED Headlights Damage My Car?

No. LED headlights will not damage your car if properly installed. In addition, you want to purchase the correct LED light that will fit your car. For example, if your vehicle has a CANbus system, you want to buy the right product and install it correctly to avoid any potential issues.

If your car was not originally designed for LED headlights, you can purchase an LED headlight conversion kit. They are safe and will not damage your vehicle as long as you buy top-quality products.

Why Are LED Lights Better?

An LED light bulb saves more energy, produces less heat, and has more light. In addition, it uses 85% less electricity than standard lighting. It is also a lower-cost product but has bright light with a longer life span.

LED light is different from incandescent light. Blue LED combined with yellow phosphor creates white light. The high efficiency of LED light makes it a popular choice.

What Is the Purpose of LED Lights?

LED lights are used as a light source in our homes, devices, and vehicles. LED (light-emitting diode) lights use gallium compounds such as gallium arsenide and aluminum gallium. LED emits light by combining a P-type semiconductor with an N-type semiconductor. Once a voltage is applied, they release energy into light.

What Is the Lifespan of LEDs?

LEDs have a long life span. When an LED is operating at 70% capacity, it has reached the end of its life span.

Incandescent bulbs have around 750 to 2,000 hours of light. In comparison, LED bulbs can have 50,000 to 100,000 hours of light, making them better investments.

Can I Replace Incandescent Bulbs with LED in My Car?

Yes! You can change your initial bulbs to LED in your vehicle. In addition, there are different places where you might want to swap out for LED lights. For example, you can change your headlights, rear license plate lights, interior door entry lights, rear brake lights, and more.

First, however, you need to inspect what type of bulb you need. There are different bulbs with various designs, so you must buy the right one to fit.

Second, different areas of your car may require special tools or specific parts to work properly. Once you have found the products you need, you’re ready to go LED.

To find more questions and answers, please visit our FAQ Page. 

Trust Badge

    Call us (718) 986-2146


    Hassle-free & easy


    On orders over $59.99


    Ships same day if order is placed before 2PM EST



2X 921 White LEDs
2 Years


T8, T12,T15, 194, 175, 168, #555, 2886X, 194R, 161B, 3652, 193, 658, 2827, 194NA, 161, 558, 168NA, 2825, 194G, 160, 168A, 192, 2821, 194B, 158, W5WB, 579, 168, 2825ST, 168ST, 3652LL, 579LL, 2825LL, 168NALL, 2825L, 2821LL, 168LL, 194ST, 161LL, 194NALL, 2827LL, 158LL, 194LL, 906NA, 917, 906, 916NA, 904NA, 922, 916, 904, 921, 912, 920, 921K, 916LL, 921LL, 912LL, 920LL, 917LL, 906LL, 916NALL, 904LL, 921ST
Reverse, Back Up lights


1.5In/ 38MM
.51In/ 13MM
Amber White
Amber and white Switchback
Amber Green
Red Blue
Red White

Customer Reviews

Based on 19 reviews
Hood light for engine

Very big improvement and great replacement for the engine compartment lighting

John Wesley
They don’t fit

I bought 2 sets on for a 2020 Honda hhr and one for 2019 ram 2500. Niether set fits

19 ram should take 7440 and these will fit a Honda HRV

Neal Hufstetler
Very Bright

Ordered the back up lights for my 2017 GMC Sierra. They’re much brighter than the OEM and gives the truck a newer appearance.

Lance Keenan

T15 921 Canbus Projector LED Reverse Light Bulbs, Extremely Bright White High-Power (PAIR)

Christopher Coll
1 x T15 921 Canbus Projector LED Reverse Light Bulbs

The bulbs work very well. I bought them for
My wife’s vehicle and she is also loving the fact that she backs her car up now with more light. Great product. Thanks Underground Lighting!