e27 led bulb voltage:220V power:5W Lm:500lm plastic shell life expectancy:50000H li Grandwork Electronics Co., Ltd.We have been working on the R&D for LED lighting for over 3 years, now we have make great progress for the module structure and heatsink design, the luminous efficiency our our lighting module now reach 100LM/W, which can be widely used for Ball Bulb lamp, tube lamp and street lamp. ...