[@Overlord Thraka]

Eh I would say that so long as they keep themselves healthy (Which is really the major factor in one's life expectancy), I'd say they live longer than humans but less than full elves. Like a full elf could live a thousand years if they keep themselves healthy, a half elf could live up to two hundred. Though depending on what their other half is, they may mature physically either more quickly or slower than that of a human, but not as slowly as an elf.