If you want to use the same sight that military and law enforcement professionals use when they need to work on their low light shooting, take a closer look at the Ameriglo Pro-IDOT Sight. (geekwrapped.com)
Again, many people think this shot must be photoshopped, but all those giraffes in those exact places under that exact sky is what you can see if you wait long enough, or are lucky enough — there were plenty of tourists there witnessing the same sight. (scientificamerican.com)