ST 520 Front/Rear LED USB Bike Light Set - Black



Made for being effectively seen from the front and rear when cycling.
Front and back rechargeable LED light kit with a continuous and flashing mode for being seen both day and night.


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VisibilityPower: 5 to 20 lumens Continuous or flashing mode
AutonomyFlashing mode: 9 hours Continuous mode: 5 hours Rechargeable via micro USB
VersatilityWHITE (1 mode) and RED (2 modes) Universal elastic mount
WaterproofIPX 4: withstands spray and heavy, persistent rain.
Warranty2 Years
Technical Information

Thanks to feedback provided by cyclists and other road users (drivers, pedestrians, etc...), our design teams have defined optimum features linked to cyclists' visibility. With one purpose in mind: ensuring cyclists' safety.
Battery capacity: 160 mAh (500 cycles guaranteed) LED light power: - White mode: 20 Lumens, - red mode: 5 Lumens.
battery life9 hrs flashing / 5 hrs normal

Charge time2 hours
Information / Concept / Technology
Lens : 100.0% Polycarbonate (PC) Inside room : 50.0% Battery - Li Po, Inside room : 50.0% PCBA Structure : 100.0% Silicon

Product test
Lab tests are conducted to approve components: batteries, battery life, UV resistance, durability, etc. The final product is then tested to simulate the durability of the assembly over time. The light is fitted to a test bike to reproduce the vibrations of cycling on a road for several thousand cycles.


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Not very bright
Used for 3 to 6 months
Rear light is good but front is not very bright in very dark condition, but will enable other road users to see you
Elmo’s choice
Used for 2 to 8 weeks
Well made, easily removed for security.
A serious design failing
Used for 3 to 6 months
I was initially quite pleased with these lights , light, portable, sufficiently bright when cycling on well lit city streets and sufficient battery life for my purposes. But when I had to rely on the front light cycling on a dark country road I realised the rather dangerous flaw in the front light, the plastic bezel is not shielded from above the light and lights up quite intensively, this is in your eye's view continuously when cycling which severely compromises your night vision, the light itself is relatively dim and so to use it for keeping track of the edge of the road without street lighting you need good night vision which is compromised by this bleeding of bright light directly to your eyes from the unshielded bezel. This is quite a serious flaw and unnecessary in the products design. A running fix is easily managed with a strip of electrical tape, but this should not be necessary.
Response of the brand
Dear Sir,
Thank you for taking the time to post a review of these lights. These lights are indeed more in the "to be seen" category rather than the "to see with" category. For urban use they are great but for unlit roads, they are not powerful enough. Generally speaking you need to aim for more than 200 lumen for riding in darker conditions. I agree that the light can be unnerving and I will forward this on to the team at Decathlon cycles.
Peter, Cycling Manager, DECATHLON
LED light set
Used for 2 to 8 weeks
Easy to fit brighter than expected
Bike lightd
Used for 2 to 8 weeks
Not over used but what Ihave seen so far Ian very happy
Good lighrs
Used for 1 week or less
Very bright and a good price
Lights won't hold charge, shockingly bad component
Used for More than 2 years
Bought the lights, worked fine for the first 6 months. I then had to go away for a year an a half because of work. On return, nearly 2 years after purchase and on;y 6 months of actual use, the lights won't hold charge. They will only power when connected to mains, not quite the purpose they were purchased for.

I am extremely disappointed after paying around £20 for them. It is shocking how poor quality components they have inside if they die simply for not using them. I see that you provide a 2 year life warranty, which means these lights are out of it. I really can't recommend this or any product from this brand as I imagine the same happens with all their products.

Are you trying to force recurring revenue by forcing people to buy bike lights every 2 years? Shameful.
Response of the brand
Dear sir,
I have just replied directly to you.
I would like to confirm that we will replace the item under warranty and that we do not seek out at any point to make our items become faulty after 2 years.
Peter Lazarus, National Cycling Manager, DECATHLON
Sam found this answer helpful
Value for money
Used for 2 to 8 weeks
Hold charge well very bright
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