If you want to give yourself an enormous advantage over any kind of attacker -- whether they're armed, trained or just plain psychopathic -- then the best thing you can do for yourself is do your martial arts and self defense sparring in the dark.

Why?

Simply because, statistically speaking, the vast majority of violent crimes happen at night, under cover of darkness -- when you can't see a thing, or when visibility is extremely low.

And if you know how to fight when you can't fully see everything (and everyone) around you...and your attacker is foolishly relying on his weapon or the element of surprise (as most violent criminals do)...then your chances of winning and dominating the fight go through the roof.

In fact, this this is such an important skill the military special ops...and even your local police force...are required to train in low-light (even pitch black) scenarios.

And you know what?

When you do the same thing -- when you start to spar and practice your martial arts skills in the dark -- as well as in other environments, like in the snow and ice, rain and fog, and even in the extreme heat -- you'll always be a step or two ahead of anyone who tries attacking you, no matter when or where it happens.