I and the crew I worked with must be some of the few that's not had that problem. Have had to stakeout or move for hours in the dark, then light everything up and go. Agreed, not fun on the eyes...but very doable.
As for distance, never short change oneself in that operational area. A enclosed area such as rooms in a house won't require the lumens that an outside open area will.
Both are a very basic training issue.
I still run X300 Ultras. So what do I know?