Power Spectrum of the Current of Compact Fluorescent Lamp (CFL) Compared to the AC Input Is it possible for an AC current (current passing from CFL) to have a harmonic component greater in magnitude than its fundamental?

In my country fundamental frequency which carries power is 50 Hz. But, when I pass this power to CFL(compact fluorescent lamp) and get the FFT of the current passing through it (through MATLAB). The spectrum shows me fundamental component(50 Hz) magnitude less than the third harmonic(150 Hz) roughly twice of the fundamental.

Hope this will clarify my question.
The simple explanation is that the Compact Fluorescent Lamp (CFL) acts as Non Linear System and hence generates signals with different frequency than the input.  

Another thought would be that the sampling channel as a whole has different response to those frequencies and it damps 50 [Hz] / amplify 150 [Hz] (Or both).

You take into consideration the whole chain until you get the digital signal.