... lightbulb could saving over 50% electric charge than normal 40W fluorescent lamp(Real power consumption is 42-45W),the efficient lightbulb ... ,it is over 3 times of T8 fluorescent lamp lifetime and 2 times of T5 fluorescent lamp.4.pipe in pipe efficient lightbulb ... the replacement using of all the T8 pipe with the ballast, and the lighting of Factory,school,workshop,store,warehouse,office..etc ...