... , in general, only about 70% of the efficiency of fluorescent lamps. Led fluorescent lamp is 120 degrees luminous, so all light are ... not contain mercury, non-polluting. We know that fluorescent lamps contain mercury. 36mm fluorescent lamps contain 25-45mg of mercury, 26mm (t8 ... very harmful to the human body of toxic substances, mercury vapor of 0.04 to 3 mg lead to chronic poisoning ...