... Day White:5000-5500k Cool White: 6000-7000K8, Replacement of Fluorescent Tube 20WSpecifications1,Base:T82,Lifespan:50,000H 4.Certificate ... general, only about 70% of the efficiency of fluorescent lamps. Led fluorescent lamp is 120 degrees luminous, so all light are ... contain mercury, non-polluting. We know that fluorescent lamps contain mercury. 36mm fluorescent lamps contain 25-45mg of mercury, 26mm ...