So you would confine the creator by the laws He created? A supernatural event this was, yet it is limited by a constraint of waiting for the light to travel? If you can find a scientist that can create stars by commanding them to exist, then perhaps we can figure out God’s limits by asking the scientist. Otherwise, Genesis 1 indicates days, not years. To make any other claim is to accept man’s feeble knowledge before God’s truth and eyewitness account.
A guy at church once asked me if God couldn’t create the light already on its way to earth.
Of course he could. But why would he? To fool people into thinking the universe is older than it is?