^^^ This.
And don't buy the "most lumens you can afford," unless you are hunting coyotes at night. Anything much over 300 lumens can be just as disorienting to you as the other guy if you're inside.
What is magic about 300 lumens? Is your personal light 300 lumens and it's okay, but any more than that is too much?
"Too much light" is a matter of how you use your light more so than how bright it is. I guarantee that if you're right against a white wall and your purposely or carelessly shine your 300 lumen light against it, you're going to have about as much trouble as someone with a 500 or 900 lumen light. Intensity drops with the square of the distance, so when you're too close and you shine you light on a highly reflective surface, you're going to have issues even with a 120 lumen light.
I disagree. My 960 lumens doesn't bother me indoors unless I look right into the beam.
x2, I use a Quark flashlight at 810 lumans and have a big open house to cover, works perfect.
How you use is and where you use it makes all the difference in the world.
I'd much rather have as much light available as possible. If I need less for some reason, I can accommodate it.