How Fast Does Light Travel In One Hour?
How Fast Does Light Travel In One Hour? Light travels at a constant speed of 1,079,252,848.8 (1.07 billion) km per hour. That works out to 299,792,458 m/s, or about 670,616,629 mph (miles per hour). How fast is light an hour? Sunlight takes about 8 minutes and 17 seconds to travel from the Sun to Earth