What does the y-axis of Lomb-Scargle periodogram represent?

Periodogram obtained by Fourier transform contains information about the original data's amplitude, but the so-called "Lomb-Scargle power" seems to not preserve the amplitude of the original data.

I'm guessing that the peak with the highest Lomb-Scargle power has the most dominant frequency, but not sure about the exact definition of it.

I need to explain the definition of Lomb-scargle power in a formal company white paper.

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    $\begingroup$ Hey Eric, I understand your urgent need for an answer, but do you really think that asking essentially the same question for the fourth time, after your previous three attempts (1, 2, 3) revealed no answer is going to help this time around? Sorry to say that but if I'm honest, I doubt it. $\endgroup$ – Florian Jul 16 '19 at 15:10

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