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The Crimson Trace 01-01690 (often marketed as the RailLight) is a high-output, tactical pistol light that stands out for its unique "Walking Light" feature and variable power settings.
While many weapon lights are strictly "all or nothing," this model is designed for administrative tasks and navigating in the dark without completely blowing out your night vision.
Technical Specifications
| Feature | Details |
| Max Output | 1,000 Lumens |
| Output Modes | 5, 100, 250, 500, and 1,000 Lumens |
| Secondary Light | Downward-facing Red LED (Walking Light) |
| Activation | Ambidextrous Side Buttons + CT Motion (Shake-to-Wake) |
| Battery Type | 1x 16340 (Rechargeable) or 1x CR123 |
| Material | Aerospace Aluminum (Black Nitride finish) |
| Mounting | Universal Rail (Picatinny/M1913 and Glock Rails) |
Standout Features
- Red LED Walking Light: This is a small, low-intensity red light that points toward the ground. It allows you to see where you are walking in total darkness without revealing your position as easily as a white light or losing your natural night vision.
- CT Motion Technology: The light can be set to "Shake-to-Wake." If the firearm is moved or drawn from a holster, the light (or the walking light) can automatically activate based on your presets.
- Variable Dimming: Unlike the standard 1,000-lumen "wall of light," you can program the 01-01690 to lower levels if you are concerned about backsplash off white walls in a home defense scenario.
- Snag-Free Design: The chassis is incredibly smooth with no exposed fasteners, making it less likely to catch on clothing or holsters during a draw.
Important Compatibility Note
Because of its unique shape and the downward-facing red LED, this light has a different footprint than industry standards like the Streamlight TLR-1 or SureFire X300. You will likely need a custom holster specifically molded for the Crimson Trace RailLight, as it will not fit into standard light-bearing holsters.
