吸(xi)(xi)頂(ding)(ding)(ding)(ding)燈(deng)能直接吸(xi)(xi)附在(zai)(zai)天花板上，光(guang)源多以白熾燈(deng)為(wei)主，照(zhao)明(ming)(ming)方式(shi)一般為(wei)向下投射、散光(guang)、全面(mian)照(zhao)明(ming)(ming)等。選(xuan)擇(ze)吸(xi)(xi)頂(ding)(ding)(ding)(ding)燈(deng)尺寸時(shi)，先要考慮(lv)吸(xi)(xi)頂(ding)(ding)(ding)(ding)燈(deng)用(yong)在(zai)(zai)什么范圍(wei)。如果(guo)(guo)用(yong)作客廳(ting)光(guang)源，要選(xuan)擇(ze)散光(guang)或者全面(mian)照(zhao)明(ming)(ming)型(xing)的；餐廳(ting)多選(xuan)擇(ze)向下投射照(zhao)明(ming)(ming)方式(shi)；臥室光(guang)源需要柔和(he)，可選(xuan)用(yong)散光(guang)照(zhao)明(ming)(ming)。其次要考慮(lv)照(zhao)明(ming)(ming)面(mian)積。舉例來說，如果(guo)(guo)照(zhao)明(ming)(ming)面(mian)積在(zai)(zai)15平米(mi)左右(you)，那么吸(xi)(xi)頂(ding)(ding)(ding)(ding)燈(deng)直徑在(zai)(zai)40cm為(wei)佳；如果(guo)(guo)照(zhao)明(ming)(ming)面(mian)積在(zai)(zai)20—35平米(mi)，則吸(xi)(xi)頂(ding)(ding)(ding)(ding)燈(deng)選(xuan)擇(ze)直徑60—70cm比較合適。更大的空間(jian)可以選(xuan)擇(ze)兩個吸(xi)(xi)頂(ding)(ding)(ding)(ding)燈(deng)，采用(yong)雙照(zhao)明(ming)(ming)模式(shi)。