No one would say that.
A light-year is a UNIT of distance, not time.
The Big Bang Theory Season 1, Episode 17
...by enabling a low UNIT cost
for manufactured goods.
The Big Bang Theory Season 2, Episode 18
"Affray in Marcelo Usera, any UNIT near?"
Money Heist Season 1, Episode 6
A car length is not
a standardized UNIT of measure.
The Big Bang Theory Season 2, Episode 5
Lieutenant Alcázar speaking,
Civil Guard UNIT.
Money Heist Season 3, Episode 2