This product works well as a blue filter.
I frustratingly discovered its fragility after a drop from approximately 4' cracked the glass and broke one of the two hinges. This was surprising to me based on the build quality of my other surefire products.
Reviewed by JK (Posted on 11/14/13)
Fits: All flashlights and WeaponLights with a 1.37" bezel
- Fits 1.37" bezels
- Cam-locking lever keeps filter securely attached to flashlight
- Spring-loaded filter lid stays up when open, locks in closed position
- Provides secondary protection to flashlight window
- Helps preserve dark-adapted vision