Disassembled 10-watt LED light bulb (810lm) manufactured by ACUMA. Very quality product for 5.90€. There were found out next properties during examination: *Advantages: ** cosφ=0.739 ** lack of cosφ is compensated by high-efficiency diodes SMD_2835 ** flickeing are totally missing - safe for eyes ** simple construction - easy to repair it ** large heat sink ** heat sink is arounded by extremely thick PVC cover only to insulate it electrically *Disadvantages: ** low quality soldering ** several LC-filters - may cause interferences for sensitive appliences