✔ Ultra mini 400LM bike light with high efficiency LED

✔ Anti-glare lens design increase riding safety

✔ Enhanced side visibility with side lighting design

✔ USB-C fast charging port saves you more time

✔ Easy-to-read multiple battery power indicator

✔ IPX7 waterproof rate, capable to withstand water immersion up to 1m depth

✔ Easy and multiple mounting methods with Garmin mount

✔ Tough metal case ensures longer life durability

Olight RN 400 Bike LED Light Headlight High Efficiency

Olight RN 400 Bike LED Light Headlight Anti-Glare Beam Light Olight RN 400 Bike LED Light Headlight USB-C Charging Olight RN 400 Bike LED Light Headlight Easy Read Indicator Olight RN 400 Bike LED Light Headlight Garmin Mount Olight RN 400 Bike LED Light Headlight Adapter Quickly Olight RN 400 Bike LED Light Headlight Easy Operation Olight RN 400 Bike LED Light Headlight Using Scenios Olight RN 400 Bike LED Light Headlight Runing Time Olight RN 400 Bike LED Light Headlight Specification




Product Name
Product Name
RN 400
General Data
Unique Characteristics
Flash 1 (lumens): 0-200 / Run-time Flash 1 /  7 hrs Flash 2 (lumens): 0-200 / Run-time Flash 2 / 5.5 hrs
Form/Size Factor
Compact Size
Light Source
Luminus SST-20
Light Mode
Side Button
Compatible Batteries
3.7V 900mAh
Charging Type
USB-C Charging Cable
Max. Performance (lumens)
Beam Distance (m)
Beam Distance (ft)
Lighting Levels
Light Mode 1 (lumens)
100 lumens
Run-time LEVEL 1
6.5 hours
Light Mode 2 (lumens)
200 lumens
Run-time LEVEL 2
190 minutes
Light Mode 3 (lumens)
400 lumens
Run-time LEVEL 3
100 minutes
Technical Characteristics
Daily Commuting, Urban Riding
Carton Blister
Head Diameter (mm / in)
31/ 1.22
Weight (g / oz)
85/ 3
Waterproof Level
Package Contents
RN 400 x 1
Handlebar mount x 1
Silicon strap x 4
USB-C cable x 1
3mm hex x 1
User Manual x 1
GOPRO mount x 1
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Feb 17, 2023, 14:17:33

Lights are nice, not all models have usb-c plug so check that out if you dont want to carry multiple plugs. Also, handle bar mount is terrible, really really terrible. A slight bump on the lamp will make it come loose from the base, then there is nothing to stop it from falling down. The strap and screw system is just bad design, too.


Jun 25, 2022, 16:21:38

CS reply:

Thanks for your support. We kindly suggest you contact our customer service for help if there is anything wrong with your RN 400. Please just contact We will reply to you within 48 hours.

Jun 27, 2022, 21:47:51

I buy 4 of them for my 2 nephews for chistmas, that is 2 each since they lives in country and needs some more light than urban riding. Also this duplication add some redundancy and, since they are young boys, this configuration's fixations are stronger and gives a wider and uniform beam since theses are lightweight and uses the same brakets than the RN1500 I uses but that is 3 times heavier. I Try them both and the beam is more white and focussed than the RN1500 and 800lm(2x400lm) is enought. Single configuration is good for urban riding where other light source is present. I would like a more precise battery level indication than Red(<20%)/FrashRed(<10%) may be some pules width between Green/Red proportional to battery level.


Oct 21, 2021, 19:22:17

Emit a white focussed beam powerfull enought for urban uses. I Uses 2 x RN400 to gets 800lm with a wider beam and gives some redundancy for safety. Very strong braket since LightWeight.


Oct 14, 2021, 21:16:11

Favorable comment


Oct 14, 2021, 21:16:11

Haven't put it through rain yet, but it's a bright and reliable light for night rides and to bee seen during the day.


Oct 06, 2021, 15:34:36

I previously bought the RN 1500 and love it so much, I decided to buy the RN400 for daytime flash use. Yes, I know, I could just use the RN1500 in flash mode but I'd prefer to save that for exclusive night time use to keep the battery fresh and ready. The RN400 is like a mini version of the RN1500. Same build quality, same materials, same great light!!! It's a small light so it's discrete on your handle bar during the day. I'm forever sold on garmin mounted lights like most of Olight's lights. The constant light modes are a bit dim for night use, maybe the 400lumen mode on lit urban streets, but definitely too dim for off road trail use. It could be good as an emergency back up light though. The flash modes are the same as the RN1500, slow flash (Flash 1) and more of a strobe flash (Flash 2). Like I said, I only intend to use this during the day on flash mode and the run times are good enough for that purpose. Looking to get another RN1500 for longer rides. I love these lights!!!!


Aug 24, 2021, 18:56:29

CS reply:

Amazing!!! Thanks for your kind review and we appreciate it very much. As you mentioned in the message, we use Garmin mount to hold it in the bike which is one of our special designs. The lumens will completely satisfy your need if you want to have a bike trip in the evening.

Aug 25, 2021, 03:43:12

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File Name Size Link
Manual_RN 400.pdf 1150KB