How can one consider what Baha'u'llah offered, if you say you are unsure.
I will offer Muhammad was the Sun and Ali the Moon. Ali gained his light from the Sun of the Muhammad Revelation (Peace be upon Then), given to Muhammad by Allah.
Thus they were both the Light of God, Muhammad radiance was as the Sun, Ali was as the Full Moon in all its brilliance, deriving that light fr9m the Sun of Muhammad.
Only the Messengers get the Light directly from Allah, they are the Suns. The Imams, or Disciples are as Moons.
This is logical and a reasoned reply, alao reflecting the Material world. The Suns and the celestial globes that are sustained by those Suns.
This also indicates the unlimited expanse of the Messengers across our universe and all the other worlds of God, reflected in this Tablet by Abdul'baha.
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So much wonder to discuss, but so silent we must become.
Regards Tony