Fixing the Decathlon Foldable bike lights – Testing Lezyne 500/250/200/150 lumen Upgrades!

After around 2,000 km on my Decathlon M900 folding bike, it is still one of my favourite bikes — especially when travelling by train. But there has always been one part of the bike that I wanted to improve: the lights. In this video I finally do something about it. I take the original Decathlon front and rear lights out into the darkness and compare them with several rechargeable Lezyne bicycle lights, looking at something that is difficult to judge from specifications alone: what do these lights actually look like in real use? The test includes different rear-light designs from 150 to 250 lumens, together with a 500-lumen front light. I compare brightness, visibility, beam performance, mounting position, charging, ease of removal and the usefulness of features such as deceleration/brake alerts. One thing becomes very clear: the highest lumen number does not automatically make a light the best choice for a particular bike. Mounting position matters. A light underneath the saddle may look fantastic on a road bike, but what happens if you have a saddle bag or wear a long jacket? And on a folding bike, you also want something compact that can stay out of the way and be removed quickly for charging. Charging turned out to be another surprisingly important part of the comparison. The original Decathlon rear light uses CR2032 batteries, while modern rechargeable lights offer a much more convenient solution. I also compare different generations of USB charging and explain why this matters to me on a bike that gets used regularly. My eventual setup is a 500-lumen Lezyne front light and 200-lumen Lezyne rear light — roughly €100 worth of lighting — and at the end of the video you can see the combination operating in darkness. This isn’t intended to say that Lezyne is the only answer. There are excellent bicycle lights from Cateye, Knog, Garmin, Bontrager/Trek, Specialized, Sigma, Blackburn, Exposure, Moon, Magicshine, Topeak, BBB Cycling, Ravemen, Busch & Müller, NiteRider, Oxford, Pinnacle and many others. But whichever brand you choose, I think they deserve the same real-world evaluation: don’t just compare the lumen number on the package. For me the important questions are: • How much usable light do you actually get? • How visible is the rear light in real darkness? • Where can you mount it without clothing or luggage covering it? • Does it interfere with a folding bike? • How easily can it be removed? • USB-C, older USB charging, or disposable batteries? • How long will it run between charges? • Are brake/deceleration functions actually useful to you? • And ultimately — is the more expensive light really the better light? I also show another small modification to my M900: replacing the heavy permanent mudguards/fenders with lightweight removable ones that can simply be taken off and put in my bag when I don’t need them. After 2,000 km, the M900 hasn’t disappeared from my collection. Quite the opposite. It remains my go-to folding bike for combining cycling with trains and travel. This is simply the next step in making it work better for the way I actually use it. If you’re considering upgrading the lights on a Decathlon M900, folding bike, commuter bike, road bike or everyday city bike, I hope this side-by-side test helps you decide what actually matters before spending your money. Tested in this video: Lezyne Fusion+ Drive 500 Lezyne Zecto Drive 200+ Lezyne KTV Drive Pro+ Alert 150 Lezyne Saddle Alert 250 Decathlon M900 original front and rear lighting 👍 If the comparison helped, give the video a thumbs up. 💬 Tell me in the comments what lights you’re using — particularly if you’ve tried Lezyne against Cateye, Knog, Garmin, Exposure, Ravemen or another major brand. #decathlon #Lezyne #BikeLights #BicycleLights #FoldingBike #test #bikelights #cycling #commuterbike #bicycle #LezyneLights #foldingbike #cyclinggear #bikeupgrade #cateye