1,Tube diameter :T2,T3,T4,T5 2,100% Tir phosphor 3,Real power:>85% 4,Lifetime: ... ,UL. 2013 hot new CE & RoHS high quality 5U lotus lamp ApplicationHome,hotel,restaurant,office,meeting room,shops and supermarket1.Warm ... market It was designed to preheat the filament prior to lamp ignition in order to extend the lifetime of tube.After ...