Inquiring further into why it is called ‘Radiant’, the purpose for using this name is now explained:

There now appears for the sugata heirs a light
More bright than copper, born from cultivation of
The thirty-seven factors of enlightenment –

On this ground there appears for the bodhisattvas a glow exceeding the lustre of copper previously explained, and this comes from their practice of the thirty-seven factors of awakening. Thus, since the fire of genuine wisdom blazes brightly, this bodhisattva ground is named Radiant. The thirty-seven factors of awakening are the four applications of mindfulness, the four correct abandonments, the four miraculous legs, the five faculties, the five powers, the seven limbs of awakening and the eightfold noble path.