I like streamlight. I have one of there last gen polytac lights on my shotgun.
You want a single mode, no strobe or low power mode. Unless the default mode is the brightest and you need a special way to use them. Streamlight requires you to push and hold the button to change modes.
I suggest one around the 150 lumen range for indoor use. Much brighter and you will blind yourself with reflected light off the walls. If you don't believe me, shut yourself into an interior room, lights off and sit in darkness for 30 minutes. Long enough to fully acclimate to the dark... No laptops or phone screens... Then turn on a 200 lumen or more light and point it at the wall. It will hurt... And that is what will happen when you wake up to a bump in the night.
I also prefer a tail cap button type light... Mine is mounted on the side and forward of the front hand guard. Easy to activate with my support hand thumb... But a pressure switch will work too, it's just more crap to deal with on the gun.
Remember, self defense is close range, you don't need a been that reaches 100+ yards. You need a beam that has a bright center but enough width to the beam to allow good situational awareness. If you need to be looking out in a large yard, use a second light.
A beam that is all over bright with no hot spot will work too, but test that it does not blind yourself as well.
I like my polytac, but the new model adds some complications in the way of extra modes and increased brightness. It is supposed to be programable though, and the brightness may not be too much. And the streamlight method of activating different modes is likely to be there. Best to read the manual online if you consider it. The pistol mounted lights seem good too, but I never really looked at their dedicated long gun options... If they have any, never cared to look.
The surefire lights all seem to be going for bells and whistles that get in the way on many of there lights... Though the ones designed to mount on a weapon using a rail (the pistol models at least) seem to be simple enough.
Just find a light that is easy to use and works for the needed task. I gave some cautions to look out for, so keep that in mind.