yep....if nothing else for the couple of seconds that it'll take him to figure out what I just did.
You certainly have more faith in that light than I do at 8 feet. I hope you have two seconds as you suggest. You'll need it, he can be on you in less than one from 8 feet.
If he moves on you while you are going for it because he thinks you are drawing your own knife or gun, you'll not get to either to begin with. Lots of faith in time to present, time to confuse the threat, etc. at 8 feet.
Best of luck if you find yourself in that situation, with that game plan.