... 17hours. 2),Very long life: LED: 50000hours. Normal electric incandescent lamp: 1000hours. 3),Very good quality: The housing of ... of aluminum, very steady, quake-proof, while normal electric incandescent lamp is easy to broken during the transportation, and ... No radiation, No pollution. Environment friendly. While normal electric incandescent lamp not. 5),Very safe, only need small working voltage ...