The heliopause is not measured in light years. It is the boundary where the solar wind, the stream of charged particles emanating from the Sun, is stopped by the interstellar medium.

The distance to the heliopause varies depending on the direction. It is estimated to be:

* Around 110-160 astronomical units (AU) in the upwind direction (facing the direction of the Sun's motion through the galaxy).

* Around 230 AU in the downwind direction.

To convert AU to light years:

1 AU = 0.00001581 light years

Therefore:

* 110-160 AU = 0.0017-0.0025 light years (upwind)

* 230 AU = 0.0036 light years (downwind)

So, the heliopause is very close to the Sun compared to the distances measured in light years.