The Importance Of Daytime Running Light (DRL)

In an increasingly congested and complex road environment, driving safety is an issue that should be of high importance to every driver. To meet this challenge, vehicle visibility becomes one of the key factors. In this regard, Daytime Running Lights (DRL) play an important role. As a headlight system that turns on during daytime driving, Daytime Running Lights not only add a distinctive look and style to a vehicle, but more importantly, they enhance driving safety.

In this blog post, we will explore the benefits and functionality of DRLs, shedding light on what are they and how do they work. 

What are Daytime Running Lights? How do they work?

Daytime running light, or DRL for short, also known as daytime running lamp, headlight, daytime running lamp or daytime running lamp, is an automotive lighting device located at the front of a motor vehicle that automatically turns on when the engine is running and keeps emitting white light during daytime driving. It is different from a car headlight in that its purpose is to help make the vehicle more visible during daytime driving, making it easier for pedestrians, vehicles or other road users to notice that a car is approaching and thus avoid a traffic accident.

The daytime running lights automatically illuminate when the vehicle engine is started, so that pedestrians and other drivers can notice that an oncoming vehicle has started its engine, and help pedestrians and other drivers to distinguish between stationary, started and moving vehicles on a road or parking lot with multiple vehicles parked. Daytime running lights that turn on and off automatically with engine start can prevent drivers from forgetting and not turning on or off.

What is the Purpose of Daytime Running Lights? Do i need them?

The purpose of daytime running light (DRL) is to enhance the visibility of a vehicle during daylight hours. They are typically low-intensity lights located at the front of a vehicle that automatically turn on when the engine is running, providing increased visibility to other drivers on the road.

DRLs serve as a safety feature by improving the chances of a vehicle being seen by other motorists, pedestrians, and cyclists. They help reduce the risk of accidents, especially in conditions where visibility may be reduced, such as during dawn, dusk, or in areas with heavy traffic. DRLs make it easier for other drivers to identify the presence, size, and distance of a vehicle, reducing the likelihood of collisions and improving overall road safety.

While regulations regarding the use of DRLs vary by country, many countries have made it mandatory for new vehicles to be equipped with DRLs. However, regulations can differ, so it's important to check the specific requirements in your country or region. In general, having DRLs installed on your vehicle can significantly enhance safety and visibility, even during daylight hours, and it is recommended to have them if they are legally required or if they can be installed as an aftermarket accessory.

How Do I Use Daytime Running Lights?

  1. Refer to the vehicle manual: First, consult your vehicle manual to understand how to use DRL correctly. Different vehicle brands and models may have different settings and operating methods.
  2. Start the vehicle: After starting the vehicle, DRL may automatically turn on. If they don't, you'll need to activate them manually.
  3. Locate the control switch: Look for a switch or button near the vehicle dashboard or steering wheel that controls the lights. This switch may be labeled as "DRL," "Daytime Running Lights," or something similar.
  4. Activate the DRL: According to the vehicle manual's instructions, adjust the switch or button to the appropriate position to activate the DRL. Typically, this position is in the "ON" or "Auto" mode of the switch.
  5. Confirm activation: Once the DRL is activated, observe the front of the vehicle to see a pair of bright lights turn on, enhancing visibility.

Nighttime driving caution: Remember that DRL is intended for daytime driving only. During nighttime or low visibility conditions, you should use the regular vehicle headlights instead of relying on DRL.

Can I Add Daytime Running Lights to a Car? 

Yes, if your vehicle does not have DRLs, you can add them. We do not recommend that you do this work yourself unless you are an experienced do-it-yourselfer. While installing a universal DRL system is not brain surgery and can be done in an afternoon, it is, after all, the vehicle's electrical system. Any mistake can have a negative ripple effect on the entire electrical system. In addition, whether the installation is performed by you or a professional installer, it is important to follow the specific rules for daytime running light placement and orientation.

If you do choose to perform this work, we recommend using a universal kit for almost any car, truck or SUV. COLIGHT has running lights with their own DRLs that are very easy to install and also turn it on/off in a timely manner.


Like 5x7inch Mars Series lights not only has an unparalleled combination of driving beams in addition to its two small built-in daytime running lights. @zr2vince mounted yellow 5x7inch Mars Series lights in front of the guardrail. Also known as forward facing lights, they are designed to make the vehicle more visible during the day. Two light options: white & yellow.


From the above content, it can be understood that daytime running lights (DRL) have two main advantages:

Improved visibility and safety: DRL enhances the visibility of vehicles during the daytime, making them more noticeable to other drivers. It helps reduce the risk of collisions and improves road safety, especially in low light conditions or adverse weather.

Energy efficiency and environmental friendliness: Compared to regular vehicle headlights, DRL typically uses low-power, high-efficiency LED light sources. This means they consume less electrical energy, resulting in reduced fuel consumption and carbon emissions, thus promoting energy efficiency and environmental sustainability.

Attention: It is important to note that DRL is not suitable for nighttime driving as their brightness is relatively low and they cannot provide sufficient illumination. Therefore, regular vehicle headlights should still be used during nighttime or low visibility conditions

With the continuous progress of technology and the development of society, daytime running lights (DRL) have become an indispensable part of modern automobiles. They play an important role in enhancing driving safety, reducing the risk of accidents, and promoting energy efficiency and environmental friendliness. As we look to the future, we can expect DRL to continue evolving and innovating, adopting more advanced technology and intelligent features to provide drivers with safer and smarter driving experiences.

We hope that this blog has helped improve your understanding of daytime running lights and their significance. Let us all work together to create a safer and more comfortable driving world. Wishing you safe travels on the road!