With the country on the upgrading of fire safety standards, 8w fluorescent lamp will be insteaded by our LED lamp with 3w, it can keep bright 180 minutes(3 hours ) when power off, the battery inside charge by float-type with fire-retardant and flame-retardant and acid-free environmental protection, ultra-high brightness of the planar LED light source, high efficiency and energy saving, high security and reliability, all of use of environmental materials, structure simplicity, easy installation high strength, light weight with aluminum frame.