String life depends upon various factors - how you play, and also your finger sweat!!
I've got DR hi- Beams on my white basses, the Jazz has had the same strings on for about a year and a half, and still sound great - nice and glassy, with the classic solid bass fundamental.
However, when Guy Pratt used that very same bass, with a fresh set of Hi-beams on it, the strings were completely gubbed after two weeks. Sounded like someone kicking a cardboard box down the road! Hahaha.
My brother (who is a guitarist), can turn unwound stings completely black within the space of a single gig!! All due to his acidic sweat. Yuck.
(I've attached a pic of Guy sound checking with the bass when he first borrowed it).