Buy it now, carry it always
I no longer consider myself fully armed unless I am carrying my Surefire Lumax or Defender. At night the advantage gained over an adversary you can temporarily blind and even disorient is tremendous. I have done drills simulating a charge from 7 yards by a knife wielding assailant that clearly demonstrated it may be better to have the Surefire alone than only a handgun. You may empty your gun into your attacker, but probably not in the 2 seconds before contact is made, and still get stabbed. With the Surefire you are able to dodge and run because the attacker moves toward where he last saw the light. The Surefire also is a skull cracking, eye gouging, throat crushing impact weapon when you get unlucky and contact is actually made. With a Surefire and a handgun your chances of not getting knifed and also making the assailant DRT are tremendously improved. I own 4 Surefires that range from 15 to 220 lumens. When you get up to lumen levels over 150, the stobe technique is really disorienting. Even the smaller 60 and 100 lumen level Surefires when strobed are fairly effective in disorienting your assailant. They all destroy your assailant's night vision. I have purchased 3 others for female family members. They all "love the little flashlight" and feel much safer because with it they are far more likely to avoid attack.
"In a world devoid of semiautomatics, a properly set-up Webley is the ultimate full-size self-defense handgun."