Light was everywhere in the Academy of Light and all existences basked in this affinity.

They illuminated the cultivators along with the mortals, vegetation, and animals

Because of this blessing, the land resembled a paradise freed from illness and misery. For example, the clearest example would be comparing the mortals in Repentance City versus those living outside. The latter had a longer lifespan.

In terms of drinking water, the streams outside were sweeter with better health benefits for drinkers.

Thus, the light had positive effects on all aspects of light. Repentance City was the only exception.

Thats why those living outside