ambient light - wrong side ?

Hi,

I perform:

gluLookAt();
glLightfv(GL_LIGHT0+num, GL_AMBIENT, light_ambient_color);
glEnable(GL_LIGHT0+num);
glEnable(GL_LIGHTING);

glTranslate();
glDrawModel();

But strangely, the ambient light is _white_ from one side, but if I
turn over camera, the object is blue (ambient_color). What could that
be?

--
-Gernot
int main(int argc, char** argv) {printf
("%silto%c%cf%cgl%ssic%ccom%c", "ma", 58, 'g', 64, "ba", 46, 10);}

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