How about the led downlight open hole size when installing ?

Yes,it is important thing we should note,below is answer:

2''  led downlight size:φ93×H105mm. Open hole size：φ77mm
2.5'' led downlight size:φ102×H106mm. Open hole size:φ84mm
3'' led downlight size:φ116×H120mm. Open hole size：φ93mm
3.5'' led downlight size:φ126×H125mm Open hole size:φ100mm
4'' led downlight size:φ152×H155mm Open hole size:φ124mm
5" led downlight size:φ160×H175mm Open hole size:φ145mm
6" led downlight size:φ190×H205mm Open hole size:φ175mm
8" led downlight size:φ333×L235×H125mm Open hole size:φ207mm