Am I happy? So so ...

Basically, the lamp is fancy, nice and flat. Enclosed with no fastening material, was criticized a lot here, and I do not want because it received more (-1 point). Who wants, certainly finds a way.

The lamp has no switch-on delay and is illuminated absolutely uniformly. Nice. The light color in daily is great, nice and warm, maybe a tiny bit too reddish, but whatever. Compared with a conventional light bulb to me illuminated surfaces appear colored sluggish. Not too great, but I could live with (-0.5 points).

But: who responds to something sensible: The lamp flickers. No 50 Hz, felt rather 100. So, briefly hung from oscilloscope - and, yes, indeed, appears to be the back-up capacitor is not large enough, so that the output voltage from the power supply between about 43 and 53 V fluctuates (see attached file). I see the light on and it bothers me (-1 point); My experience says that most others do not see it rather.
The screams of course for a retrofitting the lamp with a back-up capacitor. So, a few quick 1000 uF 63 V and ordered (note the polarity!) Parallel hung on the power supply. Yippie, the flicker is gone, the voltage fluctuation is now
The thing with the light color remains. I think I'm going the lamp (with extra capacitor) hang in the basement in order to illuminate a few shelves well. With capacitor it may even be worth 4 stars.

The obligatore Notice for copier: Of course I do not take responsibility that the storage capacitor is not at some point in a long operation makes the opponent and ugly spots leaves. At my trial run at least one heating was not be felt.

Parallel to this lamp I have the "High Power LED Panel ULTRASLIM HI-POWER Warm White 30x30 cm 12W SLIM lamp light" (also here at Amazon) ordered (and accidentally posted this review there first). This has not flicker (see review here), and is of the color of light a little nicer, warmer. However, she is not nearly as bright. For workspaces I would prefer this here probably for living areas I need to retest.

I hope I could help with the review one or the other in their purchasing decision ...