medium lights (.012 - .056), also called bluegrass, light mediums (depending on the company)
are what i like to use on a 6 string steel string acoustic (GC, GA, DN or GS, 25.5" scale) -
neck relief adjustment (if any) was minimal & no additional set-up (nut slots, etc) was needed
on the larger DN & GS bodies, i like the depth the medium bass
strings provide & the definition/playability of the light treble strings
for Elixir 80/20 NanoWebs, it would be part # 11077 (light mediums)
i've tried lighter strings (custom lights .011 - .052, extra lights .010 - .047) & custom gauge
sets (.011 - .054 light E, A, D & custom light G, B, e), but in terms of tone, longevity & feel,
it wasn't long until i went to lights (.012 - .054) & then to bluegrass (.012 - .056) -
some finger style, strumming & flat-pick, but i felt that with .010 - .047s, to my ear, all i heard
were the strings (the wood combination made no difference - sitka/sapele to redwood/ziricote)
there is more of a difference in tension felt, imho, between the G, B & e than there is on the
E, A & D on medium & light gauge strings, but one may feel more of a difference in the larger
diameter of the E, A & D on a medium set - it boils down to personal preference in feel & tone
ymmv