How should you use a sun lamp for a circadian rhythm disorder?

I have DSPS. I recently purchased a sun lamp. At what times should I use it? I currently fall asleep 12-1 and aim for enough sleep to wake up for 6:30.
Is there a time besides in the morning to use it as well?

In the Bible versus the Quran: When the Lamb is the Lamp and Substitutes the Sun?

The Moon is mentioned in the Bible 41 times, 32 times in the Old Testament and nine times in the New Testament. The Moon is mentioned in the Noble Quran 25 times.
In the Bible, Revelation 6:12, 8:12 and 21:23 say: 1) there was a great earthquake; and the sun became black and the whole moon [...]