You thus find two states here, with regard to the Nukba. One state is when Nukba was with Ze’er Anpin, the state of the two great lights, when Nukba was equal to Ze’er Anpin. The second state is after the Nukba was diminished and was formed in the mystical meaning of the lesser light (Genesis 1:16).
The meaning of this is as follows: When the Nukba that is separate from Ze’er Anpin was initially established, the Creator connected it with the Nukba in the body of Ze’er Anpin, which is the mystical meaning of the left side of Ze’er Anpin, as stated above, and together they became a single Nukba for Ze’er Anpin. When the brains of right and left were drawn for these aspects of Nukba from Bina, Ze’er Anpin – which is the mystical meaning of the right within Ze’er Anpin – took the lights of the right of Bina. The Nukba that is separate from Ze'er Anpin took the lights of the left of Bina, like the Nukba in the body of Ze’er Anpin, since the separate Nukba had become attached to the Nukba in the body of Ze’er Anpin into one Nukba.