Tatiana Whitlock gives an excellent overview of how and why you should consider using a weapon-mounted light for home defense.

It always amuses me when I hear people saying that they don’t want their light mounted on a weapon, because they claim that it will result in “the bad guy seeing the light and shooting at them from the dark.”

I tend to suspect that people who are making that claim have never been subject to a 125+ lumen weapon-mounted light used correctly in momentary bursts.