The yellow of the stoplight casts a glow on the metal of the fixture.
The amber of the middle circle lights up the background.
Colors can be interpreted and described differently, but yellow and amber are not the same. The metal of the fixture is not necessarily referring to the background.
exists e1 x1 x2 x3 x4 x5.(n_fixture(x5) & n_metal(x4) & n_stoplight(x2) & n_yellow(x1) & Theme(e1,x3) & Actor(e1,x1) & v_cast(e1) & on(x3,x4) & of(x4,x5) & n_glow(x3) & of(x1,x2))
exists s1 x1 x2 x3 x4.(n_background(x4) & n_light(x2) & of(x2,x3) & n_circle(x3) & a_middle(s1) & Theme(s1,x2) & n_amber(x1) & a_topic(x1) & of(x1,x2) & up(x2,x4))