Hi,   
   I have a quick question. I searched but couldn't find any data on the   
   internet. The CFLs and LED lights usually run at a 100 Hz through their   
   ballast. If you take a high frame rate camera you can easily see the   
   flickering on the screen. My question is    
   during this 100Hz operation, does the CFL or Led lights change their spectrum   
   output? (I mean during their 1msec period).   
      
   In other words, is the spectrum different at the peak and at the lowest point   
   of the AC current? I have a spectrometer but not fast enough to observe any   
   change. Inputs appreciated?   
      
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