1. Product Overview
The OLIGHT RN 120 C is a high-performance, USB-C rechargeable bicycle tail light designed for enhanced visibility and safety during road, urban, and daily commuting. It features a maximum output of 120 lumens, 260-degree visibility, and intelligent sensors for automatic brightness adjustment and brake detection.
Figure 1: OLIGHT RN 120 C Smart Tail Light and its key features.
2. Safety Information
- Do not shine the light directly into eyes.
- Keep the device out of reach of children.
- To prevent overheating, do not cover the light when it is operating.
- Ensure the light is securely mounted before each ride.
3. Package Contents
Please check the package for the following items:
- OLIGHT RN 120 C Tail Light
- Seat Post Mounting Strap
- Saddle Rail Mount
- USB-C Charging Cable
- User Manual
Figure 2: Included accessories with the RN 120 C Tail Light.
4. Setup and Installation
The RN 120 C offers versatile mounting options for your bicycle.
4.1 Mounting to Seat Post
- Attach the seat post mounting strap to your bicycle's seat post.
- Align the light with the mount and twist to secure it.
4.2 Mounting Under Saddle
- Secure the saddle rail mount to the rails under your bicycle saddle.
- Attach the light to the saddle rail mount by twisting until it clicks into place.
Figure 3: The RN 120 C mounted under a saddle.
Figure 4: Installation schemes for seat post and saddle mounting.
5. Operation
5.1 Power On/Off
To turn the light on or off, press and hold the power button for approximately 1 second.
5.2 Mode and Brightness Adjustment
- Change Mode: With the light on, single click the power button to cycle through different lighting modes (e.g., Steady, Flash, Eco, Smart).
- Adjust Brightness: Within a steady mode, short click the power button to cycle through available brightness settings. The light features a memory function, returning to the last used mode and brightness.
Figure 5: Simple operation of the power button.
5.3 Smart Sensor Functions
- Ambient Light Sensor: The built-in sensor automatically adjusts the light's brightness based on ambient conditions, ensuring optimal visibility day and night.
- Smart Motion Sensor (Brake Light): When braking, the light automatically increases to its maximum output of 120 lumens for 3 seconds to alert others.
Figure 6: Auto-adjust brightness feature in action.
Figure 7: Motion sensor activating the brake light function.
6. Charging
The RN 120 C is equipped with a USB-C charging port for quick and convenient recharging. A full charge takes approximately 1 hour.
- Connect the provided USB-C cable to the charging port on the light.
- Plug the other end of the cable into a USB power source (e.g., computer, wall adapter).
- The indicator light will show charging status.
Figure 8: USB-C charging port.
7. Modes and Run Times
The RN 120 C offers various modes to suit different riding conditions. Run times are approximate and may vary based on environmental factors.
Figure 9: Output modes and run times.
| Mode | Output (Lumens) | Runtime |
|---|---|---|
| High | 35 | 20 min (+ 8h 40min) |
| Low | 5 | 20 min (+ 49h 40min) |
| Flash | 0/35 | 30h |
| Eco | 0/16 | 100h |
| Smart (Day) | 0/120 | 20h |
| Smart (Night) | 6/35 | 20h |
8. Maintenance
- Cleaning: Wipe the light with a soft, damp cloth to remove dirt and debris. Do not use harsh chemicals.
- Charging Port: Ensure the USB-C charging port cover is securely closed when not charging to maintain IPX6 water resistance.
- Storage: Store the light in a cool, dry place when not in use. Charge the battery every 3-6 months to prolong its lifespan.
Figure 10: The RN 120 C is IPX6 waterproof.
9. Troubleshooting
- Light not turning on: Ensure the battery is charged. If fully charged, try a long press (1 second) to power on.
- Light not responding: Connect the light to a charger to reset it.
- Mounting feels loose: Re-check that the mounting strap or saddle rail mount is correctly installed and tightened.
10. Specifications
| Feature | Detail |
|---|---|
| Model Number | 300000-RN120-BK |
| Max Output | 120 Lumens |
| Visibility Range | 1500 meters |
| Visibility Angle | 260 degrees |
| Water Resistance | IPX6 |
| Power Source | Battery Powered (USB-C Rechargeable) |
| Charging Time | Approx. 1 hour |
| Weight | 26g |
| Material | Plastic |
| Mounting Type | Seat Post, Saddle Mount |
11. Official Product Video
Video: Official product overview of the OLIGHT RN 120 C Bike Lights, demonstrating its features and functionality.
12. Warranty and Support
The OLIGHT RN 120 C comes with a Lifetime Warranty for products purchased after January 1st, 2023. For detailed warranty information, product support, or service inquiries, please visit the official OLIGHT website or contact their customer service department.
OLIGHT Official Website: www.olightstore.com
