Here’s what I know: Variks was alive during the Whirlwind (Book: Most Loyal) The Human Golden Age lasted about 2 centuries (Book: Marasenna) From this we can set our minimum to 200 years, obviously. Then we would add the time of the City Age and Dark Age (which lasted for “centuries”, but we have no specific numbers). Then we would add the time between the Whirlwind and the Human Golden Age (we have no idea how long this was either, but interstellar travel was involved so probably several centuries. We know it was a decent amount of time because the Eliksni were following the Traveler long enough to start warring with each other, which isn’t a short thing) So “centuries” is really the only answer we can give. If you add up the specific dates we’ve been given (200 from Golden Age, 20 years between Twilight Gap and in-game present day, etc.), the minimum lifespan should be at least 620 years. And that is a very SMALL estimate. If you have any questions about my facts and where I got them, I can direct you to them

Taking a rough estimate of dates probably around 650-750 years old. However there's a lot of holes in those dates and estimates so honestly I'd say a healthy little Eliksni could probably live to be a thousand years or older. I do find it kind of funny though that the bug aliens of the Destiny Universe have a longer lifespan than Humans...🤔 Apparently though, Awoken can live hella long from what I've read, I think they have the longest lifespans out of any other race, (other than Hive of course.) Although...come to think of it, do we know how long a good ol' Space Turtle lives for?

Typically life span would be around (give or take) 700 years. The Spider Oslo’s old, and the oldest Fallen are massive. So, maybe 700 or older