太能干了！！请问我living room and family room想装recessed LED light,

一般装几个? 想用dimmer控制LED recessed lights. 请问哪种dimmer 比较好？

I saw HALO LED ML56 (LED 5" or 6" trims, 600 lumens, 3000K), is IC rated and airtight. Lithonia Lighting 5" recessed LED is IC rated, but did not mention airtight. Does it matter? If I choose a can with airtight feature, would it solve the issue that the recessed light itself is not airtight? Is Lithonia equally as good as Halo, although the Home Depot salesman recommended Halo?

Thank you very much.