吸(xi)(xi)頂燈(deng)能直(zhi)(zhi)接吸(xi)(xi)附在(zai)天花板上，光(guang)(guang)源多(duo)以白(bai)熾燈(deng)為主，照(zhao)明(ming)(ming)(ming)方式一(yi)般為向下投射(she)、散光(guang)(guang)、全面照(zhao)明(ming)(ming)(ming)等。選(xuan)(xuan)(xuan)擇吸(xi)(xi)頂燈(deng)尺寸(cun)時，先要考慮(lv)吸(xi)(xi)頂燈(deng)用在(zai)什么范圍。如(ru)果用作客(ke)廳(ting)光(guang)(guang)源，要選(xuan)(xuan)(xuan)擇散光(guang)(guang)或者全面照(zhao)明(ming)(ming)(ming)型的；餐廳(ting)多(duo)選(xuan)(xuan)(xuan)擇向下投射(she)照(zhao)明(ming)(ming)(ming)方式；臥室光(guang)(guang)源需要柔(rou)和(he)，可(ke)選(xuan)(xuan)(xuan)用散光(guang)(guang)照(zhao)明(ming)(ming)(ming)。其次(ci)要考慮(lv)照(zhao)明(ming)(ming)(ming)面積。舉例來說(shuo)，如(ru)果照(zhao)明(ming)(ming)(ming)面積在(zai)15平(ping)米(mi)(mi)左右，那么吸(xi)(xi)頂燈(deng)直(zhi)(zhi)徑在(zai)40cm為佳；如(ru)果照(zhao)明(ming)(ming)(ming)面積在(zai)20—35平(ping)米(mi)(mi)，則吸(xi)(xi)頂燈(deng)選(xuan)(xuan)(xuan)擇直(zhi)(zhi)徑60—70cm比(bi)較合適。更大的空(kong)間可(ke)以選(xuan)(xuan)(xuan)擇兩個吸(xi)(xi)頂燈(deng)，采用雙照(zhao)明(ming)(ming)(ming)模式。