If you have ever parked beside a luxury car at night, you may see a glowing logo on the ground under the side mirror. In fact, it is a side mirror puddle light in operation. Although it is small, it is a really attractive accessory. It used to be a factory-installed feature for high-end models. However, it has now changed into an affordable aftermarket upgrade product that is suitable for dozens of car brands.
Understanding What Is a Puddle Light on a Side Mirror
The term ‘puddle light’ emerged much earlier than LED technology. Early luxury models, especially European sedans from the 1980s to 1990s, had small halogen or incandescent lights under the door mirror housing. Actually, they are practical in use.
Because LED technology is becoming more and more affordable and reliable for car use, manufacturers began to provide higher-powered LED versions for these lamps.
How Does a Side Mirror Puddle Light Work?
A side mirror puddle light is a small LED module. It is usually installed in a socket under the side mirror housing. The socket is often connected to the car’s door unlock or door open circuit. It means when you press the unlock button on your key fob or pull the door handle, a signal will travel through the circuit. And then power will reach the puddle light socket and illuminate the LED lights.
For a factory puddle light, you can see a simple white or amber light on the ground from the LED.
Side Mirror Puddle Lights vs Door Panel Puddle Lights — What Is the Difference?
Many buyers are confused about this point when they search for puddle lights. In fact, they are two totally different products that can project logos on the ground. However, they cannot be used interchangeably.
Side mirror puddle lights are also called under-mirror puddle lights or mirror logo projectors. They are often installed in a socket under the side mirror housing. You can see the projected image from mirror height, which is about 1 metre from the ground. They usually light up when people unlock the car.
Door panel puddle lights, which are also called door logo projectors, ghost lights or welcome lights. They are installed in a socket at the lower edge of the inside door panel. They project logos from about 10–20cm above the ground directly on the ground below the door. Also, they usually light up as soon as you open the door.
In fact, some vehicles have both types of light sockets while others have only one of them. Furthermore, a few vehicles have neither, so people need drilling-type lights. In conclusion, before you order any puddle light product, you should check your mirror and your door panel to confirm if there are existing sockets.
Which Cars Have Side Mirror Puddle Lights from the Factory?
In fact, since the mid-2000s, you can find factory side mirror puddle lights on most premium and luxury vehicles. For example, there are models like BMW 3 Series from the E90 generation onwards, BMW 5 Series, BMW X3, X5 and X6, Mercedes-Benz C-Class, E-Class, GLC and S-Class, Cadillac XT5, XT6 and Escalade, Volvo XC60 and XC90, Ford Mustang from 2005 onwards, Ford F150 from 2015 onwards, and Land Rover Range Rover and Discovery. If your car has a plain white under-mirror light from the factory, it is certain that you can add a logo-projecting light to the existing socket.
Quartz Glass vs PMMA Lens — Why It Matters
The quality of the projection almost fully depends on the material of the lens. Budget puddle lights usually use a PMMA (acrylic) or film chip lens. These materials are inexpensive to produce but may degrade over time. What’s more, they will gradually turn yellow under UV exposure. After that, the projection becomes blurry within 12–18 months, and the image may not be clear anymore. If you have ever seen a puddle light with a washed-out or fuzzy logo, there is almost no doubt that it used a film chip lens.
In contrast, higher-quality products use a quartz glass lens. Quartz glass has higher light transmission than acrylic. So it will not turn yellow or degrade under UV or heat exposure. At the same time, they can maintain clear, high-contrast projection in the product’s lifespan. In all, all mirror puddle lights from CarLightsLogo use quartz glass lenses to ensure quality.
Installing Side Mirror Puddle Lights — What Is Involved?
For vehicles with an existing factory mirror puddle light socket, the lights are plug-and-play, and the installation is a simple process. First, you can take out the factory bulb from the socket connector inside the mirror housing. Second, you can plug the new LED puddle lights into the same connector. Third, you can clip the mirror housing back into place. For the whole process, you need about 5–10 minutes in all for each side. You don’t need any tools but a small trim removal pick. What’s more, there is no need for you to remove the mirror from the car.
For vehicles without a factory mirror socket, the installation process is a little complex.
Available Models at CarLightsLogo
We provide mirror puddle lights for Ford Mustang (S197 2005–2014, S550 2015–2022, S650 2023–2025), Ford F150 (2015–2020 MK13 and 2021–2025 MK14 as two different products), Ford Focus and other Ford models, Cadillac (CTS, XT5, XT6, Escalade), Mercedes-Benz (triangle version for C-Class, E-Class and GLC, and rectangle version for S-Class, GLE and GLS) and Volvo (XC60, XC90, S60, V60). You can find all the products here.
Frequently Asked Questions About Side Mirror Puddle Lights
Do they drain the battery?
No. Side mirror puddle lights draw less than 1 watt per side. They only light up for a short time when you unlock the car. They have no obvious impact on battery life.
Are they legal?
Yes. Side mirror puddle lights are a common upgrade accessory in all major markets. They do not light forward or backward and will not affect other road users.
Are they waterproof?
Our products are IP67 waterproof. They can keep working regardless of rain, snow, and car washes.
Can I get a custom logo?
Yes. You can contact us by email at info@carlightslogo.com for custom mirror puddle lights. You can provide any logo, design or text at the same time.
Summary
In conclusion, a side mirror puddle light is an LED projector that is installed under the side mirror housing.
