More importantly is being able to identify the target wandering around the house as a predator and not another family member or friend.
A light of any kind marks you as a target for the criminal in your house, don't make it easy on them. Few houses are totally dark. There are night lights, lights from the stove top, and the water dispenser on the refrigerator. Put a laser on your defensive firearm and only turn it on once you have identified the prowler, determined the threat and intend to shoot. A red or green dot suddenly appearing out of nowhere and on their body has a tendency to panic anyone. If it causes them to flee, fine. You just saved yourself a big hassle with the law not to mention the costs of cleaning up the mess. Otherwise, once the target is determined to be a threa, from cover, press the trigger before they have the opportunity to. The life you save may be your own or one of your loved ones. Keep in mind that bullets that miss pass through many walls. Be aware of what or whom is in the next room. A semi auto shotgun with a short barrel like a slug gun using trap loads will eliminate a criminal just as fast as anything else, and won't go through many walls and into your neighbors home.