4U energy saving light bulb 1 uses the advanced tri-phosphor fluorescent rare earth powder, light attenuation, color rendering properties. 2. wool tube double coating of patented technologies, effective filtration process can only sense the electrical energy into light energy produced by harmful UV rays, more natural light and soft, eliminate eye visual fatigue due to continuous reading up close, belongs to the new generation of green healthy illuminated light. Carefully designed low-power high-efficiency electronic ballasts, solves the high wattage CFL temperature and short life problems. 3. the life of an ordinary light bulb 20 times; 4.5 times times the brightness of normal bulbs, than ordinary light bulbs and energy saving 80%