Light
Light can refer to electomagnetic radiation of any wavelength, or to EM radiation of visible wavelengths; that stimulate the organs of sight, having for normal human vision wavelengths ranging from about 3900 to 7700 ångstroms and traveling at a speed of about 186,300 miles per second. On the first day, God created light; God said Let there be light, and there was light.
Young Earth Creationist View
In regards to the question of how one can see starlight from millions of years of light years away, young earth creationists scientists commonly mention two things. First, these scientists assert that the Big Bang Theory has a star light-travel time problem and cite the work of Dr. Charles W. Misner. [1] Secondly, the work of young earth creationist scientist Dr. John Hartnett is cited who proposes a young earth creationist cosmology that rejects a a priori methodological naturalism approach to the question of how one can see starlight from millions of light years away. [2]