I remember clearly what is the worst low light training I ever got a few years ago.
I was on the firing line, alone, back to the range, with a range officer. He says, "Turn around and solve the problem." Close to me were two bad guys with guns, and a third bad guy holding a hostage. I shoot bad guys 1 and 2, then 3 in the head. Further downrange is another target in darkness. I kneel and "take cover" and observe. The range officer says, "OK, do you have a flashlight?" "No," I said. At the time, I didn't always bring flashlights to training because we rarely needed them.
"So what are you going to do?"
"I'll just watch from cover and see what he does, see if he moves into light where I can see him clearly or if he shoots at someone."
"Are you going to challenge him?"
"No, I think I'll just observe for now."
"OK. Holster your gun. Let's walk downrange." He shines his flashlight on the target and as we get closer, I see the target holding a badge. Off duty/plain clothes cop, probably. Then, I start seeing bulletholes in the cop. Lots of 'em. Wow, I thought, our guys really screwed up.
During the debriefing, the range officer says, "Everybody did well on that last scenario. . .except you (nodding to me). You didn't shoot the last target. I know you forgot your flashlight, but you need to do something. Even though everybody else had flashlights, they either didn't see the badge or couldn't tell what it was or something, so everybody shot him. Good job, everyone (not sarcastic)."
Wait, I don't shoot the cop, and I messed up? I was dumbfounded--I literally could not speak I was so amazed. I know, I should have a flashlight, but that wasn't what he was saying. Officers were being told to shoot someone they couldn't identify as a deadly force threat!
It brought home how important a super-bright flashlight is (because dirt, debris, water vapor and smoke may make the air cloudy) and how bad training can be worse than no training. I don't have 20/20 vision either, but that won't be much of an excuse for shooting an innocent.