Russian forces "highly likely continue to struggle when fighting at night", the UK's Ministry of Defence (MoD) has said.
In its latest update, the ministry said "numerous reports" from fighters had highlighted this trend.
It went on to say in November a social media user claiming to be a Russian soldier serving in Kherson had highlighted a shortage of night vision goggles and low-light cameras for uncrewed aerial vehicles.
"There is also likely a cultural element to Russia's problem: Russian military training has rarely emphasised night exercises instead typically building towards set-piece, daylight events to impress visiting senior officers," the MoD said.
