Defects in LED lighting although they are actually energy saving. First is its heaviness. Compared with customary lights, this type of LED must be much heavier because it is prepared with a cooling fin. Therefore, its heaviness is a gigantic challenge for the lamp bases. Second is the issue of existence span. The key factor that determines its existence span is the drive boards inside it. There are times that the lamp wick is spoiled first but the driving system is not spoiled.