  We present data on the luminescence of the Baikal water medium collected with
the Baikal-GVD neutrino telescope. This three-dimensional array of light
sensors allows the observation of time and spatial variations of the ambient
light field. We report on observation of an increase of luminescence activity
in 2016 and 2018. On the contrary, we observed practically constant optical
noise in 2017. An agreement has been found between two independent optical
noise data sets. These are data collected with online monitoring system and the
trigger system of the cluster.
