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Yes,it is a good question.Installation is the biggest advantage it have. Becuase its inlay installation,it not take space,led source hidden,no light dazzle
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Yes,it is important thing we should note,below is answer: 2'' led downlight size:φ93×H105mm. Open hole size:φ77mm
According to downlight cover,size led downlight have size:2.5',3',3.5',4',5',6',8'
On market,led donwlight have 3 different material: 1.Zinc alloy 2.Aluminum