It would be unusual to list the distance from the Sun to the planets in light-years because a light-year (LY) is a really big unit and the distance from the Sun to the planets is much smaller than even one light-year. Typically, astronomers use a unit called the "Astronomical Unit" (AU) to measure distances within the Solar System. There are 63239.8 astronomical units in a light year. Having stated that, it is possible to calculate the distance from the Sun to the planets in light-years and since that is what you asked, here is the answer...
To begin, you would need to know the distance from the Sun to the planets in astronomical units. Here is that information...
Mercury = 0.387 AU
Venus = 0.723 AU
Earth = 1.000 AU
Mars = 1.524 AU
Jupiter = 5.203 AU
Saturn = 9.529 AU
Uranus = 19.19 AU
Neptune = 30.06 AU
Please note that these are the average distances from the Sun to the planets.
Now that we have this information, the nest step is to take each of these distances, in astronomical units, and divide each one by 63239.8 astronomical units / light-year and so this gives us...
Mercury = 0.387 AU / 63239.8 AU / LY = 6.11 x 10^ -6 LY
Venus = 0.723 AU / 63239.8 AU / LY = 1.14 x 10^ -5 LY
Earth = 1.000 AU / 63239.8 AU / LY = 1.581 x 10^ -5 LY
Mars = 1.524 AU / 63239.8 AU / LY = 2.410 x 10^ -5 LY
Jupiter = 5.203 AU / 63239.8 AU / LY = 8.227 x 10^ -5 LY
Saturn = 9.529 AU / 63239.8 AU / LY = 1.507 x 10^ -4 LY
Uranus = 19.19 AU / 63239.8 AU / LY = 3.034 x 10^ -4 LY
Neptune = 30.06 AU / 63239.8 AU / LY = 4.753 x 10^ -4 LY
As you can see, these are very small numbers and that is why it is unusual to list the distance from the Sun to the planets in light-years.
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