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CL 100 USB LED Rear Bike Light

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Model: 8538019

Product Features

A photo of the CL 100 USB LED Rear Bike Light in use

CL 100 USB LED Rear Bike Light is designed for being seen efficiently from the rear on your daily urban rides.

Rear, rechargeable visibility light that clips on anywhere (helmet, clothing, compatible accessories, bike tube)


Power: 5 lumens Red light Flash mode.

Battery life

3 h in flash mode Rechargeable using micro USB cable


RED (1 mode) Clips on anywhere + elasticated fastening system (incl.)


IPX4: withstands spray and heavy, persistent rain.


weighs just 0.4 oz. Take it everywhere with you.

Product Lifestyle Image Gallery

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CL 100 USB LED Rear Bike Light,black

Product Customer Reviews

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677 Reviews
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CL 100 USB LED Rear Bike Light,black
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Good Value For Money...But!

Used this light for all my rides for 3+ months. It does what it is built for. Build quality of the light is good. Flashing light is very bright and visible from a good distance. In-built battery lasts about 3 rides...approx 1 hour each. Recharging is convenient with any USB charger. It takes about 2 hours to fully charge. The only problem is with the rubber strap which is used to mount the light. It developed cracks within 3 months. And finally broke. There is no replacement available.


Very disappointed. An online order (hk83936739) on 04/17 and confirmed delivery on 04/18. No delivery finally and no pre-notified before i asked twice to you. I planned to have a family cycling on 04/19 (Sun) but now, ruined. Totally crazy!!

Great value for money secondary rear light

Great product for a low price. Easy to charge and easy to attach to the bike, your back pocket or even your helmet. Great option as a back up light. Shouldn’t be used as your primary rear light if you are cycling on the road though. Also, run time is limted to around 2-5-3hours of continuous use, so be mindful of that if you are doing a long ride.

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Dear Andrew,

Thank you for purchasing the 8538019 - CL 100 LED USB Rear Bike Light - Red and the great review that you have provided. Also to note, the product is light and you can take it out in the rain too.


Running the Extra Mile
Lai Boon
Sports Advisor
Running Department
Decathlon Joo Koon

Good value

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Not satisfied with the product quality

Hello, I am a regular customer of decathlon, many times I purchase from offline store from Amnora mall. This product I purchased in dec 2019, and as I am regular cyclist with reputed cycling club of Pune got disappointed with the quality of this tail lamp.. it got torned and now m unable to tie it to cycle. I won't say the product is bad, but now within 3-4 no this it's of no use to me. Please suggest

Hello Sonal,

Thank you for taking time out to review our product. Our accessories are covered under 2 year warranty against manufacturing defects. In this case, it is not a manufacturing defect. Still as a gesture, we request you to please visit your nearest Decathlon store to proceed for an exchange.

Currently, our stores are closed due to the ongoing crisis. Please call up the store before planning your visit. Hope this helps. Thank you!

Ebin M

Nice product for cycling

Nice product for cycling

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good sharp LED lights

Good good sharp LED lights - blinking and rechargeable - got three of these.

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Not water proof

Claims to be rain proof and have 3 hours battery life, mine has neither. After 2 weeks use, I have not got more than 90 minutes use before needing a charge and it now has water inside and won't turn off.

Thank you for your feedback regarding these lights. Indeed it seems that they have failed on both counts.
I have sent your comments on to the team who manages this item at b'Twin.
In the meantime, please don't hesitate to return them for a refund.
Peter, Cycling Manager, DECATHLON
Damage piece

Defective piece not recharging and we returned it back.

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Dear Swarna,

Thank you for taking time out to review our product. I regret the inconvenience caused to you. In spite of quality checks in place, I believe you must have received a defective piece. I hope you had a seamless experience during the return process. You can explore the full range of cycling lights here

Hope this helps. Thank you!

Ebin M

Awesome Product

Loved it

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CL 100 LED USB Rar Bike Light Btwin

Bought this for commuting, well worth the money

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Stopped working after using it twice.

Used it twice after buying it, then hadn't used it for a couple of months. Now it doesn't turn on even after charging.

Dear Gopinath,

Thank you for taking time out to review our product. I am sorry our Clip light 100 did not meet your expectations. Please feel free to visit your nearest Decathlon store to proceed for an exchange.

Hope this helps. Thank you!

Ebin M

The Light is Good but

The light is good, the backup is good, no issues with that. Only thing that really was not upto the mark is the clip. I used it for around 1-2 Weeks by strapping it behind my seat stem and it was all well. After that I purchased a bad and used the clip to hang it. I checked it multiple times to ensure that it got fixed properly. However, on my first ride itself (On Noida Express Way) it never reached back home. Feeling bad about it. I would recommend this light but do not use it with clip. The rubber strap with it is good.

Handy and easy to use.

Charge battery build in w/o looking for replacement battery.Suggest CL100 LED light come with white LED light for front access.

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Hi Mr Wong,

Thank you for purchasing our lights.
The CL 100 LED USB Rear bike light is our lowest price rear USB "To be seen" light.
It can be attached onto the seat post, rear of some of our helmets and many of our bicycles bags and accessories.

Our USB dual colour light can switch between red or white light.

Cycling Department Joo Koon

Après un mois d'utilisation, il cesse de charger tout seul, avant que la batterie soit remplie (mais il clignote toujours!)

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Additional Product Information



  • 100% Acrylonitrile butadiene styrene

Inner tent

  • 100% Pcba

On/Off System

  • 100% Silicone


  • 100% Styrene ethylene butadiene styrene


The Vioo Clip was designed to attach almost anywhere. You can attach it onto your clothes, your bag, your shoes or your bike using its elastomer strap. Additionally, B'Twin has created numerous compatible products, such as mudguards, panniers, helmets, etc. that a Vioo Clip can be attached to. The Vioo Clip can go anywhere: no more forgetting your lights or having them stolen.


LiPo battery capacity: 80 mAh. Guaranteed for 500 charges.



Superior quality. Unbeatable prices.

For 40 years, Decathlon has delivered the best value in the retail sports industry by offering high-quality, sustainable and cost-effective products.

Decathlon makes the difference
  1. product-research

    Research and development

    delivers high-quality cost-effective products

  2. State-of-the-art production processes

    minimize manufacturing costs

  3. Optimized supply chain

    reduces retail prices

  4. laptop-checkout

    Minimal retail footprint

    lowers overhead and indirect costs


Size Guide Visual