In the Moon Worship Region, there was no true sun. This place was dim all year round. Only during the three months when the heavenly fire crossing the sky phenomenon appeared would the entire Moon Worship Region emit a bright light.
However, that light represented death.
Not all races could adapt to such a living environment. Hence, as all living beings died and revived again, some powerful races gave birth to peerless talents.
They proposed the concept of an artificial sun and, due to the relative strength of their race and generations of reinforcements, they eventually raised their own race's sun.
The light and heat didn't spread very far and could only envelop the range of the race's influence. Its might couldn't be compared to the Sun of Dawn either. However, no matter what, being able to do this was enough to provide the race with great protection.