I would second the recommendation from Sideways to consult Dawson. Great guy, great help, and if he doesn't have it in stock, he'll manufacture what you need. I have his FO front sight on my Caspian custom. This is the gun I carry in daylight or in the city at night with ample ambient light. But it isn't what I keep at my bedside.
I know this doesn't constitute conventional wisdom these days, but I don't put a mounted flashlight on my dark-of-the-night pistol. Saw my neighbor waving one around one night when something went bump in the night (we live in the big woods), and he made a great target. I use TruGlo TFO tritium/Fiber Optic sights on my night gun. They stand out big in pitch black or very low light, and the FO makes a bright sight picture in daylight. Not good for bulls-eye, but will hold minute-of-intruder all day. Just one man's opinion, but based upon concrete experience, not conjecture. Many will surely object, because everyone's night fighting situation is a little different, but most will have something useful to offer.