吸(xi)(xi)(xi)頂(ding)燈(deng)能直(zhi)接吸(xi)(xi)(xi)附在(zai)天花板上(shang)，光(guang)(guang)(guang)源多以(yi)白熾燈(deng)為主，照明(ming)(ming)(ming)方式一般(ban)為向(xiang)下(xia)投(tou)(tou)射、散光(guang)(guang)(guang)、全(quan)面(mian)照明(ming)(ming)(ming)等。選擇(ze)(ze)吸(xi)(xi)(xi)頂(ding)燈(deng)尺(chi)寸時，先(xian)要(yao)考慮吸(xi)(xi)(xi)頂(ding)燈(deng)用(yong)在(zai)什么(me)范圍。如果用(yong)作客廳光(guang)(guang)(guang)源，要(yao)選擇(ze)(ze)散光(guang)(guang)(guang)或者全(quan)面(mian)照明(ming)(ming)(ming)型的；餐廳多選擇(ze)(ze)向(xiang)下(xia)投(tou)(tou)射照明(ming)(ming)(ming)方式；臥室光(guang)(guang)(guang)源需要(yao)柔和，可選用(yong)散光(guang)(guang)(guang)照明(ming)(ming)(ming)。其(qi)次要(yao)考慮照明(ming)(ming)(ming)面(mian)積。舉例來說，如果照明(ming)(ming)(ming)面(mian)積在(zai)15平米左右，那(nei)么(me)吸(xi)(xi)(xi)頂(ding)燈(deng)直(zhi)徑在(zai)40cm為佳；如果照明(ming)(ming)(ming)面(mian)積在(zai)20—35平米，則(ze)吸(xi)(xi)(xi)頂(ding)燈(deng)選擇(ze)(ze)直(zhi)徑60—70cm比較(jiao)合適。更大的空間可以(yi)選擇(ze)(ze)兩個吸(xi)(xi)(xi)頂(ding)燈(deng)，采用(yong)雙照明(ming)(ming)(ming)模式。