Ok I'm sorry if this has been asked before and before you tell me to hit the search button... I wasn't sure what exactly to search.
Ok so my epihpany was: The lighter the string, the tighter (higher tension) it will feel right?
I realised this when I was thinking about physics: a lighter/ thinner gauge pulled just as long as a heavier gauge will be tighter than the thicker one.
The reason I'm worried about this is because right now I have medium gauge roundwounds on my Gibson T-Bird and I'm looking for extra light flats as I like the feel of them.
I also realised I love extra-light strings- I have a set of 40-95 Ernie Balls on my P-bass and I find myself gravitating towards that rather than the T-Bird becasue of the skinny strings.
Ok so now onto the question(s)

I want a loose (flexible?) flat wound string in an extra light gauge.
I'm looking at Chromes but they seem to be stiff, is that true?
I have medium Daddario nickels on the Bird right now.
Thanks for the help!
If I didn't make any sesne then I'm sorry!