Streamlight
I agree with Clockwork, try a Streamlight AAA. It has a very good throw for walkrounds & in-cabin stuff, fits neatly in a pen pocket and doesn't totally shut down goggs. Use an issue finger torch for the delicate stuff.
Uncontrolled tool my ar*e. Anyone who says that has never truly grasped SH or Army helo ops.
While you are at it, have a look at Sharpie permanent markers with 'clicky' operation. One handed note-taking and no Lumocolour cap to drop into the footwell.