If forced to clear your house, seems to me you have the advantage in the dark, since you should know your home's layout far better than the BG ... in that case, a flashlight gives you the ability both to use brief flashes of light to locate said miscreant and a. blind him and/or b. shoot him. Preferable of course is holing up somewhere you can defend and calling the cavalry, but that isn't always possible.
"The gun has been called the great equalizer ... It insures that the people are the equal of their government whenever that government forgets that it is servant and not master of the governed." --Ronald Reagan