A tactical flashlight is one that is designed for use by the military and police, they are generally made from aluminum and possess a very high out LED lamp, For use in a defensive situation you need an output of 120 lumens or brighter to temporally blind an attacker for the few seconds you need get away.
One of the best lights out there is the new Surefire P2X Fury with an output of up to 500 lumens. It’s little pricy but what price is your life? Below is a link to Amazon on the Fury and a link in the basics of using a tactical flashlight.
Another item is a high quality pepper spray, The one that I have found to be very effective is the Kimber Pepper Blaster, this unit offers two shot of OC pepper liquid that has a max range of around 12-13 feet. It discharges at over 90MPH so the liquid can get around even wrap around eyeglass lenses.
I carry both of these at night all the time espically when I cannot carry concealed.
|Kimber Pepper Blaster|
|Surefire P2X Fury|