very very nice!! before i went out i was doing mma training for about 11 months and man did i ever learn alot of good stuff from that!! i learned more hand to hand from that then i ever did in the military.Yes I try to practice in the worse conditions to be ready for anything.
I practice hand-to-hand combat in low light conditions too, sometimes even with no light at all.
You can also use those techniques during the day too, if you can no longer use your eyes.
Someone sprayed you in the face with pepper spray for example.
You can still "feel and shoot" your attacker.