Disassembled 7-watt LED light bulb (500lm) manufactured by Wojnarowscy. Perfect product for it's small price only 5€. There were found out next properties during examination: *Advantages: ** high cosφ (0.6) ** flickerings are totally missing ** power supply is equipped by filters ** very bright LEDs on board *Disadvantages: ** energy class is "A+" despite cosφ doesn't exceed 0.6 ** bad construction of heat sink: power supply is arounded by hot environment which might destroy light bulb on long-time operation or even bring to fire in enclosed light appliences.