✔ 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



 Olight Promise

General Data
Beam Distance (ft)
Beam Distance (m)
Max. Performance (lumens)
Charging Type
USB-C Charging Cable
Compatible Batteries
3.7V 900mAh
Light Mode
Side Button
Light Source
Luminus SST-20
Form/Size Factor
Compact Size
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
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
Waterproof Level
Weight (g / oz)
85/ 3
Length (mm / in)
72/ 2.83
Head Diameter (mm / in)
31/ 1.22
Carton Blister
Daily Commuting, Urban Riding
Package Contents
USB-C cable x 1
Silicon strap x 4
Handlebar mount x 1
RN 400 x 1
3mm hex x 1
User Manual x 1
GOPRO mount x 1
Average Rating
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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

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File Name Size Link
RN400 User Manual.pdf 1150kb Preview