What's the right temperature for aircon in a newborn babies room? I hear some people say 18-20, others say 23-25. What temperature do you have your baby sleep in?

For my children, they sleep at 25 deg, cooling temp for them. I Know some of my friends' babies sleep in 16 deg n when I went in the room, their temp is the same as my 25 deg. It could be Coz Her Aircon is the old type.