Best Rear Bike Helmet Light

Best Rear Bike Helmet Light

A rear bike helmet light can keep you safe in the traffic. Yet, only a few cyclists decide to benefit from its advantage. Considered by many a useless accessory, this tiny red light mounted on your helmet can actually save your life.

If you want to know why to use it, keep reading and discover more in this article. If you just want to see some of the best rear bike helmet lights on the market, click on the links below.

Serfas Helmet Light Rear$Star rating 4 of 5
Planet Bike Blinky 3H bike tail light w/ self-leveling helmet mount$$$Star rating 4 of 5
SIGEM LED Safety Lights$$Star rating 4.5 of 5
Topeak HeadLux Helmet Light$$$$Star rating 4 of 5
TaoTronics USB Rechargeable Bike Light Set$$$$$Star rating 4.5 of 5

Why Use A Rear Bike Helmet Light?

From a legal point of view, cyclists are not required to use helmet lights at all. Nevertheless, there is a good reason why you should attach a rear bike light to your helmet. Plain and simple, a rear bike helmet light can make you more visible in traffic.

These lights are particularly important in reduced visibility circumstances. For example, you can use it when there is bad weather or fog. Moreover, you can even use it during daylight in the same circumstances.

On the market, there are dozens of models of helmet lights to choose from. However, the choice is reduced, most of the time, to static and flashing lights.

Static lights are usually bright and designed to be seen from a distance. Together with the rear lights mounted on the bike, they have the purpose to increase your visibility.

Flashing rear lights are also bright and they are designed to draw attention. This also increases your visibility, as vehicle drivers will know there is someone in front of them. Compared to the static models, the flashing lights present the advantage of having longer lifespans. They use the battery more efficiently increasing the runtime.

From my personal experience, I suggest investing in a flashing rear bike helmet light and a static bike-mounted light. This combination will draw the attention of the drivers and increase your safety in the traffic.

Regarding helmet lights, you should also know that relying solely on them is illegal during nighttime. In fact, according to the law, your bike should be equipped with both front and rear lights. Therefore, the helmet lights are only seen as a reinforcement of your safety.

How To Choose A Rear Bike Helmet Light


The first thing to consider when choosing the right rear bike helmet light is the type. As mentioned above, there are two types of lights to choose from, static and flashing. I recommend flashing for the reasons already mentioned, but a static light could be more effective if you also plan to use it for purposes other than riding.

If you only want to use the rear bike helmet light when cycling, go for a flashing one.


How the light mounts to the helmet is also important to consider. Some lights come with plastic mounts designed to attach to the helmet, while others have Velcro straps. There are even some models that stick to the helmet with adhesive.

The lights with Velcro straps are probably the best. They are easy to mount, easy to remove, and you can easily mount them on any other support.

A thing to check regardless of the model is the breakaway mount. These mounting systems are designed to  break in the event of a crash, protecting you from neck damage or brain injury.


Most rear bike helmet lights use regular batteries for energy. However, you should pay attention to the quality of the batteries. Some lights, such as LED lights, need less power to provide a sufficient amount of light, therefore the batteries will last longer.

To save in the long run, invest in rechargeable batteries.


There is a clear difference between LED and halogen bike lights. While the latter are usually brighter, LED lights are more power efficient. The level of brightness is, in most of the cases, comparable with that of the halogen lights, therefore I suggest choosing LED technology.


Rear bike helmet lights can easily be used for multiple purposes. However, if you want to use the light for various purposes, make sure you choose one that is easy to put on and take off from the helmet. A light with Velcro mounting is probably the best choice.

Best Rear Bike Helmet Light

1. Serfas Helmet Light Rear

Serfas Helmet Light Rear

Serfas Helmet Light Rear is one of the most popular rear bike helmet lights on the market. Compact, bright, and easy to use, this red LED system is designed specifically for helmet mounting but it can be used for many other activities, including jogging and nighttime walking.The triangle light has compact dimensions and it is easy to mount thanks to the Velcro strap. The light attached easily to the helmet but also to your wrist, sports equipment or to your dog?s collar.

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The light is technologically advanced and comply with all local and federal regulations. The manufacturer used the LED technology to increase the runtime and battery lifespan, and the light comes equipped with CR2032 lithium batteries.

Last but not least, the light has three modes that are steady, flash and chase. The runtime arrives at 130 hours in flash and chase modes.

Things We Liked

  • Easy to mount: the light is easy to mount on any bike helmet thanks to the Velcro mounting system. It is adjustable and suitable for multiple uses.
  • Modes: the light can be used in three different modes and you can choose between maximum light or increased runtime.
  • Batteries: the light comes equipped with CR2032 lithium batteries that have a runtime up to 130 hours, depending on the selected mode.
  • Brightness: the LED light is designed to be seen from a distance. The light is bright and clear, ideal for riders and joggers.

Things We Didn’t Like

  • The batteries last for a fairly long time but they are a hassle to change.

2. Planet Bike Blinky 3H bike tail light w/ self-leveling helmet mount

Planet Bike Blinky 3H bike tail light w/ self-leveling helmet mount

Born as a regular bike tail light, this small light doubles well as a helmet light as well. The manufacturer sells it with helmet mount attachments and it is easy to give a versatile use to this tiny item.The light uses three 5-mm LEDs and it boasts a built-in parabolic lensing system that provides both steady and flashing modes. Thanks to this feature, you?ll be able to use the light in the preferred mode and choose between more light or extended runtime.

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The light is powered by an AAA battery which comes with the unit. Regarding the runtime, the battery lasts for about 100 hours in flashing mode and for over 8 hours in steady mode.

On the other hand, the light provides a 120? visibility and is ideal for multiple uses that include camping, jogging, running, riding, or simply walking the dog at night.

Things We Liked

  • Multiuse: this light is designed as a bike tail light but it doubles as a rear bike helmet light effortlessly. All mounting accessories are included in the package.
  • Reflective strips: to increase your visibility, even more, the unit features two reflective Scotchlite strips on the sides.
  • Modes: you?ll be able to use the light in two modes and choose between a steady light or a longer runtime.
  • Battery: the light is powered by a classic AAA battery that is included and that has a runtime of about 100 hours when used in flashing mode.

Things We Didn’t Like

  • The runtime in steady mode is very short.

3. SIGEM LED Safety Lights

SIGEM LED Safety Lights

If you?re looking for a rear bike helmet light to use for multiple purposes, then this set of safety lights might be more convenient for you. The set includes two red rear LED lights and one white light. They are all powered by batteries and ideal to use for multiple purposes.The lights have a powerful brightness and are powered by CR2032 batteries that can last up to 100 hours. Each light has three setting modes, which are steady, fast strobe and slow flash. They need low maintenance and are weather resistant.

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Besides the three lights, the manufacturer also offers other interesting bonuses, such as two extra batteries, a mini screwdriver and three adjustable Velcro straps for easy mounting.

Moreover, there are multiple sets available, including sets with blue or green lights as well.

Things We Liked

  • Versatile: these lights are ideal to use for multiple purposes, including rear bike helmet lights. They mount easily with Velcro straps.
  • Set: the set contains two red lights and one white light, but multiple purchase options are available.
  • Guarantee: the manufacturer offers a 30-day money back guarantee and a year of limited warranty.
  • Bonuses: the lights come with other bonuses, such as two additional batteries and a mini screwdriver, plus three Velcro straps.

Things We Didn’t Like

  • The lights are advertised as water resistant but we wouldn?t recommend using them when it?s raining.

4. Topeak HeadLux Helmet Light

Topeak HeadLux Helmet Light

The Topeak HeadLux Helmet Light is a two-in-one white and red bike helmet light ideal for all those riders who want to stand out and be visible in all light conditions. The light mounts easily to the helmet, it is lightweight and it can run for approximately 100 hours, depending on the mode.In fact, the light has three running modes that include a combination of static and flashing lights. If you use both lights in flashing mode, the battery will have an extended runtime. Otherwise, when both lights are used in static mode, the battery has a burn time of about 50 hours.

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The light is powered by two CR2032 batteries, which are included in the package. Both lights have two powerful and bright LEDs that help you get spotted in the traffic.

The best part is the combination of white and red light on the same unit. This will help you be seen easier compared to the other bike helmet lights.

Things We Liked

  • 2 lamps: the unit contains two lamps, a white and a red one. Each of them is powered by two bright LEDs.
  • Modes: you can choose between static lights, flashing lights or a combination of the two, based on your needs.
  • Runtime: the light is powered by 2 CR2032 batteries which are included and that have a runtime of about 100 hours, depending on the mode.
  • Weight: the light is easy to mount on the helmet and it weighs less than 85 ounces. You won?t even notice that there is something on your helmet.

Things We Didn’t Like

  • The lamps are less bright compared with similar models.

5. TaoTronics USB Rechargeable Bike Light Set

TaoTronics USB Rechargeable Bike Light Set

This bike light set isn?t specifically built to be mounted on a helmet but it includes a bright red rear light and a helmet mounting strap, which is just what you need to transform this lamp in a convenient rear bike helmet light. On the other hand, you?ll be able to use the front light on the handlebars of your bike.The rear light is powered by two CR2032 batteries which have an extended runtime. The front light, on the other hand, is rechargeable from any USB device or outlet.

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This complete bike lights set is versatile and both lights can be mounted either on the frame or on the helmet. This gives you plenty of options and the possibility to invest in a set that brings the most benefits.

The lights mount easily either on the bike or on the helmet and it will even be possible to switch between one and another with incredible ease.

Things We Liked

  • Bike lights set: this bike lights set includes a bright 700 lumens front light and a powerful rear light. Both of them can be mounted on a bike helmet too.
  • Battery-powered: the rear light is powered by two CR2032 batteries which have a long runtime and are easy to change.
  • Rechargeable front light: the front light is rechargeable from a USB device and it has a long runtime.
  • Emergency light: the white front light can also be used as an emergency light. This adds up to the convenience.

Things We Didn’t Like

  • Although bright, the lights are rather delicate and should be handled with care.

Conclusion & Final Pick

The Serfas rear bike helmet light is probably the best on the market. This light is powered by a CR2032 battery, is compact, lightweight, easy to use and has 3 setting modes. You can mount it on the helmet with the Velcro strap or attach it to your garments or on the collar of your dog.

The light is reliable, bright, and will certainly make you stand out in the traffic. Coming at an affordable price and reliable to use in all weather conditions, this rear bike helmet light is probably the right one for you.

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