Berean Standard Bible (BSB)
He himself was not the Light, but he came to testify about the Light.
World English Bible (WEB)
He was not the light, but was sent that he might testify about the light.
Strong's King James
He was{G2258}{(G5713)} not{G3756} that{G1565} Light{G5457}, but{G235} was sent to{G2443} bear witness{G3140}{(G5661)} of{G4012} that Light{G5457}.
The F.O.G *
(8) This one wasn't the Light but to testify about The Light.
The F.O.G Message *
Young's Literal Translation
that one was not the Light, but—that he might testify about the Light.