... , blue, Green4. life span:70000hours Features:1 green lamp, protecting the earthThe led tube light is eco-friendly with no mercury and ... to documents and clothing3 quiet and comfortable, with no noiseLed lamp will not make noise. It’s suitable to the circumstance ... libraries, offices and so on4 soft light, protecting eyesTraditional fluorescent lamp produces 100-200 times strobe per second by using AC ...