... *75*40 20Products Features1.T5 double tube aluminum alloy with reflector,polished aluminum materials,with switch,easy installation,maintenance free,saving more energy ... .4.PF:0.65/0.95,THD<10-30%.Comparing with T5 single tube series, light efficiency is improved 2 times ... .Using high efficiency ballast,10000 hours lifetime. T5 2*36W lamp fixture