Bike lights are an essential part of your cycling toolkit; not just a legal requirement, they help to keep you safe when cycling in poor visibility more than any other piece of equipment. As such, finding the best rear bike light possible can make an enormous difference to the safety of your cycling experience.

Working out what makes a rear bike light the best on the market can be difficult, so we’ve done the hard work for you and chosen 10 of the best rear bike lights available in 2021 to help you determine which is the best choice for you and your personal cycling habits.

Below, we’ve listed 10 of the very best rear bike lights on the market in 2021 and broken down the important specifications of each of them to help you make an informed decision with confidence.

View The Best Rear Bike Light Below

1. Blitzu Ultra Bright Bike Light Cyborg

Blitzu Ultra Bright Bike Light Cyborg

Check Price on Amazon

As the name implies, the Blitzu Ultra Bright Bike Light Cyborg is an exceptionally bright rear bike light, offering a high level of visibility in even the worst conditions. It offers a high level of flexibility, being easy to mount anywhere on your bike, helmet, or bag, and its large size is perfectly balanced to offer maximum visibility without becoming heavy or awkward, no matter where you choose to mount it.

It also offers a range of settings, from low power constant all the way up to full power strobe lighting. All of these result in different levels of battery consumption, but the USB rechargeable battery makes that less frustration than traditional disposable batteries.

Pros:
+ 168-lumen brightness
+ Easy to mount on bike or helmet
+ Durable construction
+ Water resistant
+ USB rechargeable

Why We Liked It – This is a light designed to ensure you’re visible in the dark no matter what sort of bike you might be using or what kind of clothing you’re wearing.


2. Ascher USB Rechargeable LED Bike Tail Light

Ascher USB Rechargeable LED Bike Tail Light

Check Price on Amazon

The rechargeable LED tail light is a versatile accessory with a range of different modes available to suit whatever your needs may be. This rear bike light can be mounted horizontally or vertically and comes with 4 different settings, constant and flashing at either full power for maximum visibility or half power for maximum battery life.

The long-lasting lithium batteries can be recharged via USB cable, making maintenance easy and straightforward, while the light comes with a strong silicon fastening strap that can be easily adjusted to fit bikes of any design.

Pros:
+ Long battery life
+ Water resistant
+ Wide angle beam
+ USB rechargeable
+ 2 pack

Why We Liked It – This is a flexible, easy to look after light that can be mounted anywhere on your bike and even comes in a 2 pack so you can make sure you’re visible from all angles.


3. Cygolite Hotshot 2-Watt USB Rechargeable Taillight

Cygolite Hotshot 2-Watt USB Rechargeable Taillight

Check Price on Amazon

The Cygolite Hotshot 2-Watt USB Rechargeable Taillight is a compact, bright LED rear bike light that packs a high level of functionality into a small package. This is a high powered bulb, with its 2-Watt power offering a higher level of brightness that might be expected from its 30-lumen specifications.

This low lumen rating is primarily due to its small size; more LEDs would lead to a higher overall brightness, but as this is a light designed for visibility rather than area illumination, the small point of high brightness is more than enough to do its job very effectively and keep you safe on the roads at night.

Pros:
+ USB rechargeable
+ Easily adjustable settings
+ Integrated clothing clip
+ 30-lumen brightness
+ Long battery life

Why We Liked It – This taillight is small enough to be easily attached to your bike or clothes without getting in the way or weighing you down at all, making it a great choice as secondary clothes mounted rear light in addition to a larger primary light mounted directly onto your bike.


4. Aduro Sport LED Rear Bike Light USB Rechargeable

Aduro Sport LED Rear Bike Light USB Rechargeable

Check Price on Amazon

The Aduro Sport LED Rear Bike Light USB Rechargeable is a large, bright option for when you’re determined to be seen in even the worst conditions. It can be easily mounted anywhere on your bike or helmet and is lightweight enough to be unobtrusive even when mounted on a helmet, but large enough to offer a high level of visibility.

It is also easy to detach for charging, making its USB rechargeable design even easier to maintain that the majority of USB rechargeable bike lights. This rear bike light offers 6 different settings, giving you full control over exactly how you want to be seen, as well as being easy to mount either horizontally or vertically on any part of your bike.

Pros:
+ USB rechargeable
+ 168-lumen brightness
+ Lightweight
+ Easy to detach
+ Water resistant

Why We Liked It – This LED rear bike light may be large, but its light weight and high brightness make it a great choice to maximize your visibility and therefore safety in even the lowest of visibility.


5. Cycle Torch Bolt – USB Rechargeable Bike Light, Bicycle Light LED

Cycle Torch Bolt - USB Rechargeable Bike Light, Bicycle Light LED

Check Price on Amazon

The Cycle Torch Bolt USB Rechargeable Bike Light is a torch shaped rear bike light, offering a focused point of high brightness rather than a wide beam, although its convex cover provides a little more peripheral visibility than other torch shaped models. Designed to fit any part of any model of bike, this rear light can be easily attached with no tools and matching front lights are available to complete the set and raise your visibility further. It can also be mounted on backpacks if necessary, making this a great secondary bike light in addition to a larger primary rear light.

Pros:
+ 10-lumen brightness
+ Convex design for side visibility
+ USB rechargeable
+ Universal fit
+ Easy to attach

Why We Liked It – A compact option, this bike light packs a large number of LEDs into a small body, offering a bright spot of light that’s easy to fit onto your bike no matter what model you’re riding.


6. APACE ClipOn Strobe/Running Lights

APACE ClipOn Strobe/Running Lights

Check Price on Amazon

Designed to fit anything from a bicycle to a dog, the APACE Clip-On Strobe/Running lights are a lightweight, compact set of rear bike lights that are easy to mount to anywhere on your bike, clothes or bag with the selection of different length Velcro straps provided. These are high brightness lights designed to make anything visible in dark conditions and are built to offer a high level of peripheral visibility as well as spot brightness to make you visible to anyone directly behind you.

The batteries are a little fiddly to replace, as these lights do not offer USB rechargeability, but their flexibility makes them a good choice for most users, and they come with an included mini screwdriver and spare batteries to reduce the effort of maintenance a little.

Pros:
+ Long battery life
+ Easy to attach and adjust
+ Versatile design
+ Water resistant
+ Compact and lightweight

Why We Liked It – These are a good choice for visibility no matter what outdoor activity you’re planning on doing. The ease with which they can be attached to bags, clothing, or dogs means that they can aid your visibility even when you’re just out walking after dark.


7. Cygolite Hotrod 50 lm USB Rechargeable Bicycle Tail Light

Cygolite Hotrod 50 lm USB Rechargeable Bicycle Tail Light

Check Price on Amazon

The Cygolite Hotrod 50 lm USB Rechargeable Bicycle Tail Light is a large, wide-angle rear bike light for high visibility in poor conditions. This bike light offers a 50-lumen brightness level on a wide angle light, making you highly visible from a range of angles while cycling in darkness or other low visibility conditions. The light features 6 different settings from low to high brightness and constant, flashing, or cycling patterns, allowing you to customize it to fit whatever your personal preference may be.

On lower brightness settings, the Cygolite Hotrod 50 lm USB Rechargeable Bicycle Tail Light offers up to 100 hours of battery life on a single charge. Higher brightness settings come with lower battery life, but any setting will offer a relatively long-lasting charge.

Pros:
+ 50-lumen brightness
+ Wide angle light
+ Water resistant
+ Lightweight
+ USB rechargeable

Why We Liked It – This tail light gives off a strong light, keeping you safe in poor conditions. It may be large, but it’s light enough to be unobtrusive and easy to use.


8. Planet Bike Grateful Red Bike Tail Light

Planet Bike Grateful Red Bike Tail Light

Check Price on Amazon

The Planet Bike Grateful Red Bike Tail Light is a simple, traditional bike light that offers moderate visibility at minimal effort. Its small LED array keeps the energy required to run it at a minimum, allowing for up to 150 hours of battery life depending on the setting used, while the integrated reflector around the LEDs boosts their brightness and visibility to a higher level.

The batteries required are standard AAA batteries, making it easy to maintain, although there is no USB charging feature. This is a straightforward, lightweight bike light which isn’t packed with extra features, making it a good choice for anyone who just doesn’t want to have to think too much about what they’re doing.

Pros:
+ 13-lumen brightness
+ Water resistant
+ Long battery life
+ Inbuilt reflector
+ Easy to install

Why We Liked It – A sturdy, reliable, simple choice, this tail light offers a reasonable visibility level and minimal thought and input. It’s a good entry level choice or backup light for more advanced cyclists.


Rear Bike Light Buyers Guide

Lumens

The term “lumen” gets used a lot when talking about lights, but what does it actually mean? Well, it’s simpler than it might initially seem. It’s a simple measure of how bright a light is, with higher numbers indicating brighter lights and therefore a higher level of visibility when cycling. You might be more familiar with watts, but these are a measure of power rather than light; LED lights offer more lumens at a lower wattage than halogen bulbs, and therefore lumens are a more useful measure of light.

A lower lumen rating will mean that you won’t be visible from as far away as a higher lumen rated rear bike light, but it will still provide that all-important close-up visibility that helps to keep you safe.

Angles

Some bike lights are marketed as “wide angle,” an important term to bear in mind. Most bike lights are designed to provide maximum visibility for cars approaching from directly behind you, and therefore have a relatively narrow-angle of lighting. Wide angle lights, however, cast light to the sides as well as behind, making it easier for other road users to see you if they’re approaching from an angle rather than from directly behind you, giving you a wider range of visibility and keeping you safer.

This is particularly important for urban cycling, where you’re likely to be doing a lot of turning corners and passing side roads, making it less likely that all approaching road users are either directly in front of or directly behind you.

Are steady or flashing lights better?

There are all sorts of legal restrictions on flashing bike lights, which can make it hard to tell if they’re actually any use. Steady lights, however, have far simpler regulations. In general, both are fine, but a flashing light has to offer a higher minimum brightness level than a steady light and cannot flash less than 60 times a minute or more than 240 times a minute.

Flashing lights will usually consume less battery than steady lights, as they’re only on for half the time, but they provide less visibility and must be brighter as a result. There’s a lot of debate as to which option is better for distance visibility or judging distance, but it’s probably worth being as safe as possible. As such, we recommend a steady light attached to your bike and a secondary flashing light mounted on your helmet, back or jacket for maximum visibility and safety.

Conclusion

There are a huge number of different rear bike lights on the market in 2020, and all of them look pretty similar at first glance. As is visible in our breakdowns above, however, there are important differences between their shapes, brightness levels, and attachment systems.

The shape and attachment system of your ideal bike light will depend heavily on what sort of bike you’re using and whether or not you’re looking to attach a light to your clothing or bag. These are very much matters of personal preference, dependent on your personal habits and situations. Brightness is a little more straightforward, however.

A rear bike light has one single purpose, which is to ensure that you are visible to other road users approaching from behind, keeping you safe when cycling in poor conditions. That means that brighter is straightforwardly better, as a brighter light will make you easier to see from further away. Similarly, bigger tends to help; a larger light source will provide more light, and make you easier to see.

Amazon Recommends:

Bestseller No. 1
Ascher USB Rechargeable LED Bike Tail Light 2 Pack, Bright Bicycle...
  • ✔ADVANCED DESIGN. The Tail Light is built in 330 mAh rechargeable lithium...
  • ✔FOUR LIGHT MODE OPTIONS: The Tail Light feature an one-touch switch with...
  • ✔EASY INSTALLATION: With a convenient one-touch dismount button, you just...
Bestseller No. 2
BV Rear Bike Tail Light 2 Pack, Bicycle LED Rear Lights, Easy to...
  • SUPER BRIGHT BIKE LIGHT AND 3 MODES ON EACH LIGHT: You can choose your...
  • EASY INSTALLATION/TOOL-LESS INSTALLATION: Simply mount the quick-release...
  • WEATHER RESISTANT: Rain or shine, summer or winter—any weather condition,...
Bestseller No. 3
NiteRider Solas 100 Lumens USB Rechargeable Bike Tail Light Powerful...
  • DAYLIGHT VISIBLE FLASH FOR INCREASED RIDER SAFETY with a long a 7. 5 hour...
  • CHOICE OF MULTIPLE LIGHT MODES 2 steady light levels: LOW @ 15. 5 hours run...
  • FAST AND EFFICIENT USB RECHARGE-ABILITY reaches a full charge in just 2...

If you liked this review, please rate below.

If you tend to go off road a lot on your mountain bike and you also like to ride your mountain bike late at night, then you will know how essential it is to have a light on your bike. This is to provide you with complete safety, as it will show you what dangers might be in front of you, not only this, but it will also ensure that you will be able to see where you’re going exactly. Plus, if you’re planning to use your mountain bike on the road, then it will make you a lot more visible to other road users so they will be able to see you.

View The Best Mountain Bike Lights Below

Therefore, we’ve put a list together of some of the best mountain bike lights that are currently trending in 2021.

1. Te-Rich Rechargeable Bike Lights Front and Back

Te-Rich Rechargeable Bike Lights Front and Back

Check Price on Amazon

This mountain bike light is the most perfect headlight, and this is because of the features that it has. You get a front and a backlight when you purchase this product, and it is rechargeable, so you won’t have to be forever buying batteries. It has a quick release, so you don’t have to worry about it being tricky to take off of your bike, plus, it’s also very easy to install back on as well and won’t take you long to do at all. It can also be attached to any type of bike, whether it’s for your bike or your kids.

Pros:
+ Includes front and backlight
+ Rechargeable
+ Suitable for all bikes
+ Quick release
+ Easy to install

Why We Like It – We liked this mountain bike light because it was so bright and when we used it you could clearly see all around you.


2. FFEX Bike Lights Front and Back – Bike Lights Set 4

FFEX Bike Lights Front and Back - Bike Lights Set 4

Check Price on Amazon

This bike light actually comes in a set of four, so if you have more than one bike, this will be perfect for you, as you can also put these lights on each of your bikes as well. They are waterproof so they can be used in any type of weather condition, plus, they are actually brighter than any headlights so you will be able to clearly see where you’re cycling when you have these on your mountain bike. These lights aren’t rechargeable so you will need to replace the batteries. They are also very simple and easy to install onto your bike.

Pros:
+ Reliable
+ Set of four
+ Waterproof
+ Bright
+ Easy to install

Why We Like It – We liked this product because they will last you a very long time and are very reliable to use.


3. TeamObsidian Bike Light Set – Super Bright LED Lights

TeamObsidian Bike Light Set - Super Bright LED Lights

Check Price on Amazon

If you want other cyclists and cars to see you when you’re out on your mountain bike at night, then this product is perfect as it will keep you very safe. It’s made from high-quality materials, and it also has an aluminum reflector. Because it is made from these materials, it means that it won’t rust or corrode at all.

It takes five AAA batteries to run these lights, but this will last you a very long time, and you will barely ever have to change them. They are also very easy to attach to your bike, and includes everything that you will need to be able to attach them to your bike as well.

Pros:
+ Keeps you safe when you cycle at night
+ High quality
+ Reflectors
+ Will never rust or corrode
+ Easy to install

Why We Like It – We liked this mountain bike light because they are so reliable and they will never let you down, as they are made from high-quality materials.


4. Cycle Torch – Shark 500 USB Rechargeable Bike

Cycle Torch - Shark 500 USB Rechargeable Bike

Check Price on Amazon

If you’re looking for a rechargeable mountain bike light, then this is perfect for you because it can actually be charged up from any USB port. It also has a very long running time, so you will barely have to charge it up. You also won’t need to buy any additional items for this light, as it already comes with everything that you need to install it.

This light is actually super bright too so you can commute in confidence, it also has a flash mode to draw attention that you’re also on the road too. It has a universal fit and is very easy to attach to any type of bike you want it to go on.

Pros:
+ Rechargeable
+ Long running time
+ Includes everything
+ Very bright
+ Easy to attach

Why We Like It – We liked this product because it comes with a flash mode, so if you’re cycling on the road cars and other cyclists will be able to notice you instantly.


5. BV Super Bright (300 Lumens) Rechargeable Bike Light Set

BV Super Bright (300 Lumens) Rechargeable Bike Light Set

Check Price on Amazon

This mountain bike light actually has three different modes, which are: run steady, steady and flash. Each of these varies on the amount of time that they can run for. The battery is rechargeable, and you can easily charge it up by using the USB cord that it comes with. It has a rapid release, as it easily attaches to the bike with its rubber straps, so you don’t need any tools to fix it on at all. It is very durable and water resistant too, plus, it has an IP44 rating, so the light will definitely stand up to the elements.

Pros:
+ Three different modes
+ Rechargeable
+ Includes everything you need
+ Durable
+ Water resistant

Why We Like It – We liked this mountain bike light because it’s so easy and simple to attach and remove from your bike.


6. Cincred USB Rechargeable Bike Light

Cincred USB Rechargeable Bike Light

Check Price on Amazon

If you’re looking for a mountain bike light that has a lifetime warranty, then this product would be ideal for you as it comes with this. This light is also rechargeable so you won’t have to keep buying batteries, plus, it only takes 2 hours to fully charge and has a running time of about 8 hours.

It also includes a free tail light to keep you protected if you ever cycle on the road. It is also a very bright ultra LED light so anyone will be able to see you from a great distance. This light is also very durable and will last you a very long time, plus, it’s waterproof so it can be used in any type of weather condition.

Pros:
+ Lifetime warranty
+ Rechargeable
+ Freetail light
+ Ultra bright LED light
+ Waterproof

Why We Like It – We liked this product because it doesn’t take a long time to recharge itself and it has a very long running time.


7. Malker Bicycle Light Front and Rear Silicone LED Bike Light Set

Malker Bicycle Light Front and Rear Silicone LED Bike Light Set

Check Price on Amazon

These rear bike lights actually come in three different colors so you can pick one that will suit your bike the best. They are very easy to install, and you don’t need any tools to put them on your bike at all. Not only this, but they also don’t have to be used just for your bike, as they can be attached to backpacks and other things too.

They are made from a premium silicone alloy, which is also very durable and can withstand any type of weather condition. When you purchase these lights, you will also get a satisfaction guarantee, which means that you can easily return them if you’re not happy.

Pros:
+ Variety of colors
+ Easy to install
+ Made from premium silicone alloy
+ Durable
+ Satisfaction guarantee

Why We Like It – We liked these mountain bike lights because they can also be used for many other things as well, for instance, you can easily attach them to a helmet.


8. BV Bicycle Light Set Super Bright 5 LED Headlight

BV Bicycle Light Set Super Bright 5 LED Headlight

Check Price on Amazon

This mountain bike light will last you up to 80 hours, so you barely ever have to change the batteries. It has a quick release mount that enables you to easily put it on the bike, as well as remove it from the bike too. On each light there are three different modes that you can select, so you have a variety of different settings to choose from. It is also weather resistant, and it will fit on most mountain bike grips, handlebars and seat posts. It can light up to 150 feet away from where the bike is, so you can really see what is in front of you and if there are any obstacles.

Pros:
+ 80 hours of light
+ Quick release mount
+ Three different modes
+ Weather resistant
+ Fits most bikes

Why We Like It – We liked this product because it can also be used on a variety of other things as well, like your dog’s collar or your backpack.


Mountain Bike Lights Buyers Guide

In the list above there is a whole load of different mountain bike lights, and it can be quite challenging to decide which one to purchase. There are some things that you will need to look out for before you decide to buy one though, and we’ve discussed all of these in the list below.

Rechargeable batteries

There are many mountain bike lights, but some of them may have rechargeable batteries while you may have to replace the batteries in other bike lights. It’s important to note that both of these types of lights will work exactly the same. However, the only difference is that if you have one that will need the batteries replaced, then it may cost you a bit more, as you will have to purchase more batteries.

Therefore it may be more expensive, but there’s actually a positive point to this because if you ever run out of charge, all you will need to do is simply replace the batteries and if this happens when you’re out you can do this instantly.

There are a lot of positive points to rechargeable batteries too, like you don’t have to pay to keep replacing them, as you can just recharge them from any power socket. However, you will need to be a little bit more organized if you have this version, as you will want to make sure that your light is always charged, so you don’t run out of power.

Weather resistant

This is a very important factor, you don’t want to purchase a mountain bike light that won’t be able to withstand wet weather because you need it to be reliable enough to still work while it might be pouring with rain. Therefore it’s important that you check the description of the product to see if it has been made from waterproof materials.

Materials

The materials that your mountain bike lights are made out of is very important. This is because you don’t want it to be made from cheap materials that aren’t going to last you a very long time. These types of bike lights may also be quite dangerous to use because you don’t want them to break on you while you’re using your bike during the night.

Therefore you need to check that they have been made out of sturdy materials, such as a type of silicone or high-quality plastic. This is because these materials won’t rust and also won’t corrode; therefore, they are guaranteed to last you a very long time, and you won’t have the problem of having to replace them.

You can find out what materials the bike light is made from by reading the product description of the bike light. Another thing you will definitely need to check is if the materials that it is made from are waterproof if they are not then we wouldn’t recommend that you purchase a mountain bike light that is not waterproof.

Buyers guide questions

How to install a mountain bike light:

One thing to note is that each bike light might differ from how you install them. Some of them may require tools to attach it onto your bike while others may not. If your bike light doesn’t need tools to attach it all that you will have to do is simply bend the piece of the rubber band around the bike, and then there will be some way of fastening it together, it may be in the form of a buckle or a clip. Once you have done this, you will then need to attach the light to it by simply clipping it onto the rubber band.

If you have the version that needs tools you will more than likely need a screwdriver. Once you have this the mount for the bike light will probably be in two parts, and there should be a hole for the screw to go in. Match the two parts up onto the handle of your bike and then place the screw on top of the hole and use the screwdriver to screw it in. Then you will need to attach the light to the mount.

After you have used your mountain bike light for quite some time, you may notice that it may have moved slightly, so you will need to adjust it. If you don’t adjust it, you may not get the full benefits from your mountain bike light because it won’t be able to give you as much light when you’re cycling. To adjust it you may need to remove your mountain bike light and then reattach it back onto the bike.

Expert tip:

It’s important that you consider the time of day that you’re going to be using your bike. This is because you don’t want your light to run out of charge when you have to use your bike at night.

Did you know?

If you’re going to be using your bike in an urban area, it’s also important that you make sure that you have a rear light as well. This way you will be more visible on the road, and other cars and people will be able to see you more clearly.

Conclusion

There is a whole load of different mountain bike lights all over the internet, and it can be very difficult when you have to make a decision over which one you should purchase. A lot of them have many different features, so it’s important that you read the product description and compare them before you purchase one.

Not only this, but it’s also important to check to see how many lights come in the product you want to purchase, because some of them may actually come with more than one light, while others may actually include a tail light too. Another thing that you will need to check out before you do purchase one is our buyer’s guide because we’ve informed you about everything you need to look out for before you do purchase a mountain bike light.

Amazon Recommends:

Bestseller No. 1
Ascher Ultra Bright USB Rechargeable Bike Light Set, Powerful Bicycle...
  • ✔ADVANCED DESIGN: USB rechargeable front and back lights, built in...
  • ✔FOUR LIGHT MODE OPTIONS: The Headlight and Taillight feature an...
  • ✔EASY INSTALLATION: The Headlight is equipped with a mounting bracket...
Bestseller No. 2
NiteRider Lumina 1200 Boost USB Rechargeable Bike Light Powerful...
  • Lock mode, perfect for use during storage and transporting the light. Press...
  • Important: the Lumina 1200 boost is set to lock mode at the Factory. Unlock...
  • All new collimator lens, Distributes a generous even widespread beam...
Bestseller No. 3
Bright Eyes Fully Waterproof 1600 Lumen Rechargeable Mountain, Road...
  • EXTREMELY BRIGHT and now FULLY WATERPROOF 1600 Lumen CREE T6 LED Technology...
  • NOW FITS ALL HANDLEBARS - - SAFETY - MORE FEATURES than any look-alike -...
  • EXTERNAL RECHARGEABLE WATERPROOF 6400mAh BATTERY - Allows Our Cycling...

If you liked this review, please rate below.