OLIGHT RN 120 C Bike Lights, 120 Lumens Tail Light 260 Degree Visibility, 1500m Viewable Range, USB Rechargeable Bike Break Light, IPX6 Waterproof, Road and Urban Cyclists

As someone who’s a big fan of OLIGHT products, the RN 120 C Tail Light is another example of why I keep coming back to this brand. I’ve had this rear light on my bike for over a year now, and it’s hands down the best tail light I’ve ever used. It’s bright, dependable, and thoughtfully designed. For something so compact, it packs a serious punch when it comes to visibility and safety. ⸻ Visibility and Light Performance Don’t let the 120 lumens fool you—this thing is bright. It’s not a gimmicky, weak tail light like so many cheap options out there. The RN 120 C is highly visible even in daylight, and in low light or nighttime conditions, it absolutely shines (pun intended). The light pattern is clean and wide, which helps make you visible from multiple angles—huge for road riding. The multiple modes (steady, flash, breathing, etc.) are all practical, and switching between them is easy. I usually ride with it in the smart mode that adjusts brightness based on ambient light, and it’s been very effective. I’ve had drivers comment that they could see me from far away, which is exactly what you want from a tail light. ⸻ Design and Build It’s compact, lightweight, and sleek. You hardly notice it on the seat post, but it looks great and doesn’t add any bulk. The materials are solid, and after a year of use—including plenty of rides in the rain—it still looks and performs like new. It’s IPX6 water-resistant, and I’ve tested that thoroughly. The mounting system is simple but secure. It’s easy to take off when locking your bike somewhere, but it never moves or shakes loose while riding, even on rough pavement or trails. ⸻ Battery and Charging Battery life is excellent. Even on higher settings, it lasts several long rides before I need to recharge. On flash or eco modes, it can go for days. USB-C charging is a huge plus—it’s fast and convenient, and the battery indicator lets you know when you’re running low. I’ve never once been caught with a dead light, which speaks to both the battery life and the accuracy of the indicator. ⸻ Pros: • Super bright and visible, even in daylight • Smart mode adjusts brightness based on ambient light • Compact and lightweight, doesn’t get in the way • Durable and waterproof (IPX6) • Easy, secure mounting system • Long battery life and quick USB-C charging • Still works perfectly after a full year of use Cons: • Would be nice if it came in a few color options (just for fun) • Not the cheapest tail light out there—but worth every cent for the reliability ⸻ Final Thoughts The OLIGHT RN 120 C is everything a rear bike light should be: bright, dependable, and thoughtfully designed. After a year of consistent use, I can confidently say it’s one of the most important pieces of safety gear on my bike. Combined with OLIGHT’s usual top-tier build quality, it’s a no-brainer. If you’re serious about being seen on the road, or just want a rear light that works every time, this is the one. Another win from OLIGHT—I’m a proud fan for good reason.

Recently upgraded this from a super cheap light with little features. This light is lightweight, compact, and has excellent battery life. I can pretty much set and forget it. The different strobe features are nice and is bright at night so I know I am safe on the road. You can mount this anywhere on your seatpost; I have this and a saddle bag and works great. No rattling, movement, or risk falling off since I've had it. I'd purchase this again.

I just love this little light. Yes it’s bright, easy to operate, and sturdy. But what really stands out for me is that it’s all so neat and tidy. The underseat mount, in particular is a very nice touch. It clips onto your seat rails and stays nicely tucked up in there. And the tiny light itself is easily clipped onto and off of said mount for charging. Props to Olight for coming up with such a clean design. It looks proper on my family’s high end eMtbs!

Small, bright light that is not only rechargeable but supports a variety of mounting locations.

PROS - very light weight light - small-ish size, fits well on the seat - easy and fast to snap on and off - bright, good safety - multiple modes - durable so far, but haven't tested it CONS - cheaper lights have more features - wish it had an accelerometer like my other light that brightens and changes pattern when it senses you braking

I take bike safety very serious, with that i own two of these. One for my helmet and one for my bike. Both are extremely extremely bright and the lighting options are even better for visibility. Quality of solid and the mounting brackets are as well so no chance of it slipping off. With trek lights I’ve purchased in the past and comparing it to this I’d say the value is here. Better bang for your buck and not over priced.

Very bright and the braking feature is cool, I use while riding on the road and don’t seem to have issues with being visible to cars. Seems durable when washing and during use. I like how you can just hit the button and it saves the setting you were on so you don’t have to waste time changing settings

Really nice to have on your bike. And they work especially if you just turn on the auto function so you don't ever have to worry about forgetting to turn on your lights. I like that whenever you squeeze the brake the light glows a bit brighter so then that shows people that you are stopping or slowing down. That's an important feature. Mounting is very easy and flexible. Charging is also very easy and flexible because it uses a USBC.