AtD translation: the glaring night

[Mike Jing]

P562.19-24   Out in the middle of the glaring night, somewhere disguised in
echo and phase-interference, chimes had begun to sound, a harmonic-minor
nocturne too desolately precise to be attributable to human timing and
muscle-power, more likely one of the clockwork carillons peculiar to this
part of Belgium, replacing a live carillonneur, whose art was said to be in
decline. . . .

What does "glaring" mean here?