-
8 15 cm, I'm a designer, listen to me right.
-
Dig according to the diameter of your downlight, it seems that there is no fixed size.
You can also go to the armed police store yourself, today they generally understand, the most.
For suspended ceilings, it is good to install four to six on one side.
For the sake of aesthetics, 50 cm can also be, preferably 60 cm, and the later decoration card is better to install. Usually the air conditioner has a professional instrument opening, and the staff will reserve 60 for you, and rarely 50. If you buy one with a fresh air function, it must be 60 cm, and the hole of the cabinet air conditioner should also be 60
The ceiling opening is only 5 cm, and spotlights can be installed.
The round ceiling lamp can be, the meaning of the outside is square and the inside is round, and it looks good with it, and the living room needs to have a higher brightness.