For the light, if you want something compact and bright for spotting a potential attacker at a distance, I would suggest a Nitecore E4K, an Acebeam E70-AL, or a Klarus G15 or XT21X. Those are pretty much your options for compact 4000+ lumen flashlights (I'm sure there are a few more I missed). Before even suggesting you carry weapons, or lights that can be used as weapons, I need to ask is that legal where you live? If you live in California, New York, or Michigan, that may be frowned on and could get you in trouble. If I lived in one of those areas, I'd get a loyal, but intimidating dog (probably a Doberman Pincher).
Recent events are making us all question if there is more we can do to keep ourselves and our families safe. This starts at home and getting to know your neighbors. Do you have a neighborhood watch in your community? Are the police able to do their job? Are criminals being punished (or let out the same day they were arrested)? Are you allowed to arm yourself away from home? If you answer no to these questions and aren't capable of defending yourself without a weapon, you should move to somewhere you feel safer. A flashlight isn't going to cut it, especially since some attacks have been happening in broad daylight. Good luck and stay safe.