吸(xi)頂(ding)(ding)燈(deng)(deng)能直接(jie)吸(xi)附(fu)在(zai)(zai)天花板上，光(guang)源多以白(bai)熾燈(deng)(deng)為主，照(zhao)(zhao)明(ming)方式一般(ban)為向下投(tou)射、散光(guang)、全面(mian)照(zhao)(zhao)明(ming)等。選擇(ze)(ze)(ze)吸(xi)頂(ding)(ding)燈(deng)(deng)尺寸時(shi)，先要考(kao)慮(lv)(lv)吸(xi)頂(ding)(ding)燈(deng)(deng)用在(zai)(zai)什么范圍。如(ru)果用作(zuo)客廳(ting)(ting)光(guang)源，要選擇(ze)(ze)(ze)散光(guang)或者全面(mian)照(zhao)(zhao)明(ming)型的(de)；餐廳(ting)(ting)多選擇(ze)(ze)(ze)向下投(tou)射照(zhao)(zhao)明(ming)方式；臥室光(guang)源需要柔(rou)和，可(ke)選用散光(guang)照(zhao)(zhao)明(ming)。其次要考(kao)慮(lv)(lv)照(zhao)(zhao)明(ming)面(mian)積。舉例來說，如(ru)果照(zhao)(zhao)明(ming)面(mian)積在(zai)(zai)15平米左右，那么吸(xi)頂(ding)(ding)燈(deng)(deng)直徑在(zai)(zai)40cm為佳；如(ru)果照(zhao)(zhao)明(ming)面(mian)積在(zai)(zai)20—35平米，則吸(xi)頂(ding)(ding)燈(deng)(deng)選擇(ze)(ze)(ze)直徑60—70cm比較合(he)適。更大的(de)空間可(ke)以選擇(ze)(ze)(ze)兩個吸(xi)頂(ding)(ding)燈(deng)(deng)，采用雙(shuang)照(zhao)(zhao)明(ming)模式。