Light rays travel at a speed of approximately 299,792,458 meters per second (m/s) in a vacuum. This is often rounded to 300,000,000 m/s for simplicity.

Here are some other ways to express the speed of light:

* 186,282 miles per second (mi/s)

* 670,616,629 miles per hour (mi/h)

* 299,792,458 kilometers per second (km/s)

It's important to note that light travels slightly slower in different mediums, like air or water.