led tube: 1.9W,1800lm,round 2.100LM/W,Isolated driver 3.Input:AC85- ... 3328 as illuminant, lumens efficiency>100LM/W; 3.Self-developed constant current driver, PF>0.9,Lifetime>30000hours; 4.Superior aluminum PCB ... : We produce all LED lamps in our office building. There are LED tubes,LED ceiling light,LED panel light,LED Bulbs,LED spot lights etc. Certifications ...