New Defender's Study Bible Notes
1:17 light upon the earth. The establishment of the sun and moon in their light-giving functions for the earth half-way through creation week is obviously inconsistent with the day-age theory. This is compounded by the fact that plant life on the earth was made one day before the sun, a situation which would be absurdly impossible if this “day” was an “age.” Furthermore, these “lights” were to be used to measure days and years. This is the plural (yamin) of the Hebrew “day” (yom). They were also to “rule over the day and over the night,” and all this was done on the fourth day. This repeated use of the same word in the passage requires the meaning in each case to be the same. The fourth “day” was thus obviously a solar day like all the rest.