1. Product Overview
The NiteRider Solas 100 is a powerful USB rechargeable bike tail light designed to enhance rider safety and visibility. It features a daylight visible flash mode, multiple steady and flash modes, and a low battery indicator. Its compact design and easy installation make it suitable for various cycling environments.

Figure 1: NiteRider Solas 100 USB Rechargeable Bike Tail Light. This image shows the compact red tail light with its black mounting bracket.
2. Setup and Installation
The Solas 100 tail light is designed for quick and easy installation on your bicycle's seat post.
2.1 Mounting the Tail Light
The light comes with a seat post strap mount. To install, securely attach the mount to your bicycle's seat post. The light can then be easily slid onto and off the mount using its quick release tab. Ensure the light is firmly seated in the mount before riding.
Video 1: Demonstrates the easy installation of the NiteRider Solas 100 tail light onto a bicycle seat post using the strap mount. It shows the light being attached and detached from the mount.
2.2 Initial Charging
Before first use, fully charge the Solas 100 tail light. Connect the provided USB charging cable to the light's charging port and a USB power source. A full charge typically takes approximately 2 hours. The LED indicator will change from red to blue when charging is complete.
3. Operating Instructions
The Solas 100 features multiple light modes to suit various riding conditions.
3.1 Power On/Off and Mode Selection
To power on the light, press and hold the power button. To cycle through the different modes, press the button briefly. To power off the light, press and hold the button again. The light will remember the last mode used when turned back on.
3.2 Light Modes
- Daylight Visible Flash (DVF): This mode is designed for increased rider safety during daylight hours, offering a long run time of 7.5 hours.
- Steady Modes:
- Low: Approximately 15.5 hours run time.
- High: Approximately 10.5 hours run time.
- Flash Modes:
- Pulse Flash: Approximately 4.5 hours run time.
- Fast Flash: Approximately 7.5 hours run time.
3.3 Low Battery Indicator
Upon powering off the device, the indicator will flash blue if the battery level is above 20%. If the battery level is below approximately 20%, the indicator will light up red, signaling that a recharge is needed.
4. Maintenance
Proper maintenance ensures the longevity and optimal performance of your NiteRider Solas 100 tail light.
4.1 Charging
Recharge the light using the provided USB cable. Ensure the charging port is clean and dry before connecting the cable. The light is designed for fast and efficient charging, reaching full capacity in about 2 hours.
4.2 Cleaning and Storage
Clean the light with a soft, damp cloth. Avoid using abrasive cleaners or solvents. Store the light in a cool, dry place when not in use. While the light is water resistant (IP64 rated), ensure the USB port's rubber seal is firmly secured after charging or before exposure to water to prevent ingress.
5. Troubleshooting
- Light not turning on or holding charge: Ensure the light is fully charged. Check the USB charging cable and port for any damage or debris. Some users have reported issues with the charging port over time; ensure the internal contacts are not bent or damaged.
- Difficulty cycling through modes or turning off: Press and hold the power button firmly for a few seconds to turn the light on or off. Brief presses will cycle through modes. If the button is unresponsive, ensure it is not obstructed.
- Light falling off mount: Ensure the seat post strap mount is securely tightened and the light is fully clicked into place on the mount. Verify that the quick release tab is properly engaged.
6. Specifications
| Feature | Detail |
|---|---|
| Brand | NiteRider |
| Model Name | NiteRider Solas 100 USB Rechargeable Bike Tail Light Powerful Lumens Bicycle Taillight LED Rear Light Easy to Install for Men Women Road Mountain City Commuting Daylight Visible Cycling Safety |
| Brightness | 100 Lumen |
| Power Source | Battery Powered (USB Rechargeable) |
| Water Resistance Level | Water Resistant (IP64) |
| Item Weight | 2.9 ounces |
| Mounting Type | Seat Mount |
| Number of Settings | 4 (2 Steady, 2 Flash) |
| Material | Plastic |
| Included Components | Daylight Visible Tail Light, Seatpost Strap Mount, USB Charging Cable |
| UPC | 702699050846 |
7. Warranty and Support
NiteRider offers comprehensive warranty coverage for the Solas 100 tail light:
- 1-year Warranty: Covers rechargeable battery cells.
- 2-year Warranty: Covers printed circuit boards.
- Lifetime Warranty: Covers any defects in mechanical components (housings, covers, mounts and fasteners) and LEDs.
For further support or warranty claims, please visit the official NiteRider store or contact their customer service. You can find more information at: NiteRider Store on Amazon.





