Best Rear Bike Lights : Top Picks for Cyclists

We are a reader supported site. We earn commissions when you buy through links on our site. Learn more.

Are you on the lookout for a set of bike tail lights for your riding – day and night?

As someone who has been through numerous bike lights buying process, I know there are many questions in your mind right now, such as:

  • How bright or how many lumens do I need?
  • How long will the battery last me?
  • Can I mount it on my seat post, seat stays, or even helmet?

Well, it’s normal to have those questions. In fact, you should be asking these questions. Here are 3 things I’d consider in a good set of rear lights.

  • Brightness between 50 to 100 lumens is ideal. Too bright and it could blind the guy behind you.
  • Rechargeable USB batteries.
  • Versatile mounting system especially if you’re using a non-rounded (aero) seatpost.

I have these covered in detail in the buying section below and also share with you some of my favorite picks.

A Quick Glance : Our Favorite Rear Bike Lights

Value for Money

Cygolite Hotshot 100 Tail Lights
Cygolite Hotshot 100 Tail Lights

Cygolite Hotshot 150

Smart Functionalities

Garmin Varia RTL510 Rear Light
Garmin Varia RTL510 Rear Light

Garmin Varia RTL510

Built-in Accelerometer

Exposure Lights Blaze Mk3
Exposure Lights Blaze Mk3

Exposure Lights Blaze Mk3

Value for Money Rear Lights

Cygolite Hotshot 150

Cygolite Hotshot 100 Tail Lights
Photo Credit : Cygolite
  • Brightness : 150 lumens
  • Battery Life : 2.5 to 210 hours (6 light modes)

If you’re looking for a bike tail light that is super bright and doesn’t blow a huge hole in your pocket, then you should consider the Cygolite Hotshot 150.

By now, you might be wondering what makes this light the budget option then?

It’s due to its design. It’s neither stylish nor sleek, but it definitely works and does its job well. You can mount it on both the seatposts and seat stays with the 2 different mounts provided. The mounting system gives you the flexibility to tilt the light to your preferred angle, but it’s definitely not pretty.

It comes with 6 different modes, which you easily adjust using a 2-button operation. The battery run time ranges between 2:30 hours and up to a whopping 210 hours running at low brightness.

  • Pros : Excellent value for money with 6 light modes.
  • Cons : USB charging port is prone to water ingress.

Cateye Rapid X3

Cateye Rapid X3 Bike Tail Lights
Photo Credit : Cateye
  • Brightness : 150 lumens
  • Battery Life : 1 to 8 hours (6 light modes)

One thing that makes the CatEye Rapid X3 stand out is its Lumens to Size ratio. The small yet stylishly designed Rapid X3 delivers 100 Lumens at its maximum brightness. This is more than enough for you to be seen both during the day and night.

It’s solidly built as you would expect from any Japanese brand, especially from Cateye, which has been in the business for more than 50 years. I also like this light because you can mount it on both the seat post and seat stays. It comes with rubber straps of various sizes to cater to this.

My only gripe with this model is that the rechargeable USB port is covered by only a thin piece of rubber and prone to getting wet if you’re caught in a heavy downpour. I’ve had one sent in for a warranty replacement due to this.

  • Pros : Slim, lightweight yet very powerful at 150 lumens.
  • Cons : USB charging port is prone to water ingress.

Knog Blinder Road R70

Knog Blinder Road R70 Black Lights
Photo Credit : Knog
  • Brightness : 70 lumens
  • Battery Life : 3.5 to 20 hours (5 light modes)

If you are in the market for a tail light that is brilliantly bright coupled with a sleek design, then look no further than the Knog Blinder Road R70.

With a total output of 70 Lumens, the Knog Blinder R70 makes you highly visible and will definitely grab the attention of drivers behind you.

The Blinder R70 also brought a lot to the table by giving you the option to choose between 5 different light modes and runtime. My preferred mode is the Eco Flash as they last much longer at 20 hours and have a flash beam that attracts attention.

The LED’s are carefully placed at an angle that doesn’t blind the drivers but grabs their attention instead.

  • Pros : 100% waterproof, dustproof, and securely sealed.
  • Cons : Rubber band for mounting is prone to breaking (but easily replaceable).

Read More : Knog Blinder Road R70 Review

Smart Rear Bike Lights

Garmin Varia RTL515

Garmin Varia RTL510 Rear Light
Photo Credit : Garmin
  • Brightness : 65 lumens
  • Battery Life : 6 to 15 hours (3 light modes)

If you’re an owner of one of the wide variety of Garmin cycling computers, then the Garmin Varia RTL 515 (Radar Tail Light) is a must-have. 

This sleek tail light is equipped with a radar that senses approaching cars from up to 153 meters away. That’s more than one-and-a-half football fields! 

It will then alert you audibly and visibly through your Garmin device. It has the capability to identify the speed of the oncoming car and will provide color warnings. An amber light indicates a car is approaching. A red light means a car is approaching at high speeds.

The Garmin Varia’s brightness ranges from 20 to 65 lumens depending on the mode and offers a 220º range of visibility. Battery life is up to 15 hours. 

Hate bulky lights that hang conspicuously off your bike? 

The Varia’s sleek vertical design makes it a shallow profile option for serious riders. This unit does require a compatible Garmin device.

  • Pros : Built-in rear radar that provides a warning for approaching cars.
  • Cons : Large size and be prepared to pay more.

Cycliq Fly6

Cycliq Fly6 Rear Light
Photo Credit : Cycliq
  • Brightness : 50 lumens
  • Battery Life : 4 to 5 hours (2 light modes)

Cycliq’s founder got the idea of his cycling cams after getting pegged by a slingshot-wielding driver while out on a ride. If you’ve ever had a similar experience, then you might be interested in the Fly6.

Cycliq is on a mission to get idiots off the road with this cycling cam.

The Fly6 is a 100-lumen tail light integrated with an HD bike camera that mounts to your seat post. Its ultra-wide hi-def lens is designed to have enough clarity to capture all the action, including license plate numbers.

The video camera records video footage on an SD card, looping after running out of space to avoid gaps. It is ANT+ and Bluetooth compatible, allowing it to interface with most Garmin computers and smartphone apps and its CycliqPlus app, which allows you to edit uploaded videos.

The Fly6 also includes a built-in bike alarm, which sends an alert to your smartphone when your bike is moved.

  • Pros : Built-in rear camera with 135º view.
  • Cons : Expensive.

Rear Lights for Maximum Visibility

Exposure Blaze Mk3

Exposure Lights Blaze Mk3
Photo Credit : Exposure Lights
  • Brightness : 150 lumens
  • Battery Life : 6 to 48 hours (3 light modes)

Want a light that will give you max visibility with some pretty cool smart functions? The Blaze Mk3 is the light for you. This light offers many options that all work together to make you more visible.

In addition to being very bright, you don’t have to worry about blinding your fellow riders. It includes ReAKT technology that gives this light some pretty cool smart functionality. 

Riding in a group? 

It will automatically dim when you are in the middle or front of the pack, then brighten when you are at the pack’s back. The Blaze Mk3 will also detect ambient light conditions and adjust brightness accordingly, ensuring that you will be as visible as possible while not blinding other riders or drivers. 

It is equipped with a lithium-ion battery that provides up to 48 hours of run time.

  • Pros : Solid aluminum body built.
  • Cons : Be prepared to pay a premium price.

Cygolite Hotshot Pro 200

Cygolite Hotshot Pro 200 Rear Lights
Photo Credit : Cygolite
  • Brightness : 200 lumens
  • Battery Life : 2 to 210 hours (6 light modes)

With a 200 lumen output, the Cygolite Hotshot Pro 200 ensures that approaching cars will see you long before they pass you.

Cygolite produced its first LED blinking tail light in 1991 and has designed lights for bikes ever since. Its latest offering, the Hotshot Pro 200, is quite simply the brightest tail light on the market. 

It offers six different flash modes that allow you to adjust the tempo of the flashes. It also senses ambient lighting, allowing it to adjust for brightness in the daytime and nighttime automatically.

Mounting is a breeze with the Hotshot Pro 200’s flexible mount, attached to both standard and aero seat posts. This light is equipped with a rechargeable lithium-ion battery that provides up to 210 hours of run time.

  • Pros : Small and compact with very long battery life..
  • Cons : Rubber straps are prone to breaking.

Light and Motion Vis 180

Light and Motion Vis 180 Pro Rear Light
Photo Credit : Light and Motion
  • Brightness : 180 lumens
  • Battery Life : 4 to 32 hours (4 light modes)

It’s common to find front lights with a wide range of intensity, blinking, and even color options. But what about rear lights? Why do they always seem to get left out? 

Light and Motion has identified that gap, and its response is the Vis 180, a rear light that comes with all the bells and whistles. This includes multiple light modes, including flashing and steady. It also has amber-colored sidelights, which make you visible from a profile view. 

A paceline mode also prevents you from becoming that guy in the paceline. This mode cuts the red light in favor of amber light, preventing the rider behind you from getting blinded. 

  • Pros : Sidelights provide additional visibility especially in urban areas.
  • Cons : 180 lumens could be overkill if you’re riding in a group.

Rear Bike Lights with Accelerometer

Exposure Lights TraceR

Exposure Tracer Reakt Bike Tail Lights
Photo Credit : Exposure Lights
  • Brightness : 75 lumens
  • Battery Life : 3 to 24 hours (3 light modes)

The Exposure Lights TraceR ReAKT has plenty of brightness and long battery life in a very compact body.

Packing a 75 lumens LED into such a compact and lightweight body is a major achievement for British-based Exposure Lights.

It’s the successor of the TraceR, with a big difference being the ReAKT (Ambient Kinetic Technology). In layman’s terms, the ReAKT is a combination of an accelerometer and ambient light sensor built into its electronics.

As you ride along roads with changing light conditions, the brightness will adapt accordingly to ensure you’re continuously visible. And as you brake and slow down, the blinking lights will change to steady light, just like a car brake light.

Mounting these requires absolutely no tools using the silicon rubber straps and plastic mount provided in the box. However, you’ll need to purchase a separate mounting for aero seatposts.

  • Pros : Sleek, compact and minimalist design.
  • Cons : Expect to pay a higher price.

See.Sense ACE

See Sense ACE Rear Lights
Photo Credit : See Sense
  • Brightness : 125 lumens
  • Battery Life : 10 hours

See.Sense is among the market pioneers that manufacturers smart rear bike lights today. The See.Sense ACE is the successor to their very popular ICON and ICON+ models.

The ACE is 125 lumens bright, bright enough to make you very visible on the darkest of roads. On top of that, the ACE features a 200° side visibility, increasing your visibility, especially around urban areas.

So, there’s no reason for a driver not to notice you. And better still, the ACE is both connected and intelligent. It has built-in sensors (accelerometer and light sensor) and electronic circuitry that allows the ACE to adapt its brightness and flashing patterns according to the surroundings.

As you brake to slow down at junctions and roundabouts, the ACE will adapt accordingly to ensure you’re clearly visible by the cars behind.

For those who’re geeky, the ACE pairs to your smartphone where you can manually control the brightness, low battery indicators, set reminders to charge, firmware updates, and even inform your loved ones in case you’re involved in a crash, with your exact location.

  • Pros : Built-in rear light sensors adjust the brightness dynamically.
  • Cons : Expect to pay a higher price compared to lights with similar brightness.

Rear Bike Lights Buying Guide

1. Brightness

The tail light’s brightness is the most important aspect you should consider before everything else.

Generally, the higher the lumens rating, the brighter it is. On the other hand, it would also consume more battery power.

Geek Tip : Get a tail light with at least 50 lumens for you to be clearly visible, both day and night.

2. Battery Life

Today, most bike tail lights manufactured by reputable brands usually have long battery life. You can expect up to 20 hours of battery life if you run them on flashing mode.

If you’re on a tight budget, there are still bike tail lights that run on replaceable alkaline batteries but they’re getting lesser these days.

Geek Tip : USB rechargeable Li-Ion are the preferred type of batteries.

3. Type of Bulbs

You’d agree with me that the era of using lights bulbs is coming to an end, and everyone is changing to the use of LEDs.

LEDs are much brighter while consuming less power, last almost forever, and doesn’t get hot.

Geek Tip : Go with LED’s.

4. Mounting Options

You might want to consider a tail light that gives you various mounting options.

Some of the common mounting locations are the seat post, seat stays, helmet, or on the bike rack if you have one.

Things get a little complicated if you have an aero or flat shaped seatpost where your choice of tail lights will be reduced.

Geek Tip : Go with a rubber strap mounting as they are stretchable over a range of seat post sizes and shapes.

Frequently Asked Questions

1. How do I mount the rear light on my road bike?

Many people would mount the tail light on the seat post. Some lights have a separate mounting for the aero seat post since its shape is slightly different.

Personally, I’d prefer a mounting system that uses silicone or rubber straps as these fit all types of seatposts and easily replaceable should they break.

Alternatively, there are also tail lights that can be mounted on the seat stays if the mounting system supports it.

However, be aware that mounting it this way is not ideal as the light is pointing towards the sky at a 45º angle rather than to the driver behind you.

2. What is the ideal number of lumens for a rear light to ensure I'm visible on the road?

Ideally, the more, the better. But that’s easier said than done.

From my experience, anything above 70 lumens, such as the Cateye Rapid X3 or Exposure Lights Blaze is ideal. 

If you’re after even higher brightness, take a look at the Cygolite Hotshot Pro 200 (200 lumens) or the Light and Motion Vis 180 (180 lumens).

Another thing to consider is the type of light modes available. You’d want it to have blinking patterns that attract attention rather than a solid red light.

Read More : Bicycle Safety – 35 Tips to Stay Safe on the Road

3. Should I use a rear light during the day?

Yes. Absolutely.

According to ROSPA, 80% of cycling accidents occur during the day, especially in urban areas where there are many distractions for the drivers.

The tail light is one of the best gifts for a cyclist family or friend. A bright tail light set on blinking mode would attract their attention and make you visible.

If you’re still not convinced, here are another 5 reasons why you should use bike lights.

Hisham Mirza

Hisham Mirza

Hisham is a staff writer who has been with us for the past two years. He likes writing about gravel riding, and he’s always looking for new stories to tell our readers.