Cloud Defensive REIN Single Constant SwitchSingle Button Constant White Light The new standard offering with your REIN weapon light. A single push of the button will activate your light in a constant on manner. While on and if needed, a slight press of the button will deactivate your light for momentary off applications. A full push of the button will turn you light back off. In critical situations, immediate and powerful lighting is essential for maximum visibility and information gathering,