Don’t expect shining even 10,000+ lumen lights at someone to give you an “edge”. People can eat half a can of pepper spray/CS to the face and keep moving and fighting.
A light lets you be more aware of your surroundings and shows to others that you are (so its a preventative self defense measure I guess?)
I’d suggest a Sofirn SP31, or Thrunite TC15 if your budget is higher.
The coupon code “20%” works on Thrunite’s website.