The brightness of the keyboard illumination

Hi newbie with a Mac dangerous I know, but then I had had enough of my windows machines.
I have my keyboard set to ilminate the keyboard in poor light conditions
I notice that when I press the illumination controls (F5, F6) I get an image on my screen of a line with 5 "sun/light" lines and under that a circle with a line through it. Is this normal? Where can I find a picture library of Apples on screen information images?

Means you can't adjust brightness because ambient light is not low enough. Needs to be quite dark. Use LabTick to control manually.
http://labtick.proculo.de
Hope this helps...

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