While I'm not a fan of pistol mounted lights... A person who's been properly trained in the use of one IMO may have an advantage. Any flashlight will give away your general position, and progression. I suggest that people use a method not discussed here as well as others that have been suggested.
Patience. Wait and see what happens... Say nothing do nothing. Give the police time to arrive. Be prepared to use deadly force... but dont become the agressor. Even in your own house. Give the intruder time to make mistakes. Wait for help. Just because a law says you MAY do something dont mean you MUST do it.