Four light hours are four light hours divided b 2 times 2
Four light-hours equates to 2,682,466,517.54 miles.
Four(4) hours
12 hours of light 12 hours of dark
The time would be T= d/c where d is the distance between Earth and Neptune and c is the speed of light.
That means 3 hours, 4 hours, or anything in between.
Four and a half hours.
About four hours.
Four hours
The duration of Fantastic Four in film is 3.53 hours.
Light-hours is a measure of distance, not time. It is the distance light travels in a vacuum in one hour's time. In this case, 13 light-hours equates to 8,718,016,181 miles.
The Amber Light Flashes For Four Seconds.
About Three Hours