50v and 150v induced voltage?

Hi. Apprentice here. Replacing lights and noticed when switch off. 1 switched active measures 50v vs neutral. Another one measures 150v vs neutral. Is that normal. I have only seen a few voltes of induced voltage. Both active measures 230v after switch turned on. Whats the cause of the 50v and 150v when turned off. Thanks. (Led lights are off when switched off. even the voltage measures 50v）
Asked boss. He didnot care as long as job was done.

TIA