... only linear T5 lamps. Differences in T5 Fluorescent Lighting Fixture Advantage: 1.T5 aluminum alloy lighting ... saving more energy. 2.Triphosphor tube,high light efficiency,high CRI,high energy saving rate. 3.Multiply types ... 18W,21W,26W,28W,;HO serie:24W,39W,54W,80W. 4.PF:0.65-0.95 ... protection. 8.Beautiful apperance,compact and goodliness. 9.High efficiency ballast,10000 hours lifetime. 10.CE&ROHS ...