Hello it´s me again ;)
first, thanks for your advice,
I spend some time understanding the diagrams... it stayed with trying to ;)

What i did so far... (and please dont laugh at me, i simply dont know better)
I "tried" to calibrate my monitor to a gamma of 2.2 using greytone testimages on the net, hoping we can now speak from equal prequisites.

i rendered props and voila, on high as well as on low intensities they are, at least as far as i can judge, more realistic with gamma correction.

Now it comes to humans ;)
on some intensities (10%-20%) gc doesnt look froggy, but better. (but its too dark to show much anything.
below 10% intensity here eyes look glowing... erm.
above 20% she looks green and it looks far worse then rendered without gc.

now my question... if i want to make a render with just an infinite light, nothing else, why cant i do a bright image with gamma?