If you have ever wondered what is a 3rd brake light, it is the extra brake light located higher than the standard left and right tail lamps at the rear of a vehicle. Officially called the Center High-Mounted Stop Lamp (CHMSL), this light is designed to improve visibility and reduce the risk of rear-end collisions. Today, it is a standard safety feature on almost every car, SUV, and truck. But beyond just being a legal requirement, the 3rd brake light comes with specific product features, specifications, and uses that every car owner should understand.
Product Specifications of a 3rd Brake Light
When buying or replacing a 3rd brake light, knowing its specifications helps ensure compatibility and performance. These include:
- Placement – Commonly installed at the top of the rear windshield, trunk lid, or tailgate. Its elevated position ensures that the light is at eye level for drivers following behind.
- Size and Shape – Available in compact sizes for sedans or extended bar designs for larger vehicles like SUVs and pickup trucks. Many aftermarket lights also come in custom shapes.
- Light Source Options:
- LED (Light Emitting Diode) – Bright, long-lasting, energy-efficient, and quick to illuminate. LEDs are the most popular choice today.
- Halogen Bulbs – More affordable but have shorter lifespans and produce more heat.
- Voltage and Power – Most are designed for a standard 12V system, making them compatible with nearly all vehicles.
- Lens Material – Usually made from durable, heat-resistant plastics such as polycarbonate, with red-tinted lenses for optimal visibility.
- Weather Protection – Many models are sealed to be waterproof and dustproof, ensuring reliability in rain, snow, or off-road driving.
- Design Options – From sleek, clear lenses to smoked or tinted finishes, aftermarket 3rd brake lights are available for drivers who want style along with safety.
Product Uses of a 3rd Brake Light
The 3rd brake light is more than just another lamp it serves a variety of safety and practical functions:
- Enhanced Visibility – Positioned higher than standard brake lights, it catches the attention of trailing drivers more effectively.
- Accident Prevention – Studies show that cars with 3rd brake lights have fewer rear-end collisions compared to those without.
- Compliance with Laws – In most countries, driving with a non-functional 3rd brake light can result in fines or penalties.
- Vehicle Customization – Car enthusiasts often upgrade to LED or bar-style lights for a modern look and brighter performance.
- Safety in Poor Conditions – The extra brake light helps ensure visibility in heavy rain, fog, or nighttime driving.
Types of 3rd Brake Lights
There are several types of 3rd brake lights available, each catering to different vehicle needs:
- OEM Replacement Lights – Designed to match factory specifications, perfect for restoring a vehicle to its original condition.
- LED Bar-Style Lights – Sleek, modern, and ideal for trucks and SUVs looking for both performance and aesthetics.
- Custom or Smoked Lens Lights – Popular among truck owners who want a stylish edge without compromising safety.
Maintenance and Replacement
Like any light bulb, the 3rd brake light can fail over time. If your light burns out, it’s important to replace it immediately to remain compliant with road safety laws. LED options last longer and require less frequent replacement, but if one fails, replacement is straightforward and affordable. Regular checks are recommended simply press your brake pedal while parked and confirm the light activates, or use a reflective surface to test visibility.
Final Thoughts
So, what is a 3rd brake light? It is a high-mounted safety light designed to improve visibility, reduce rear-end collisions, and ensure legal compliance for drivers everywhere. With specifications built for durability, waterproofing, and compatibility, along with uses that range from safety to customization, the 3rd brake light is one of the most important yet underrated parts of a vehicle’s lighting system.
For reliable replacements, LED upgrades, and custom options, visit Scorpion Truck Stuff. They provide high-quality 3rd brake lights and truck accessories built for performance, safety, and style helping you drive with confidence while standing out on the road.