Disassembled 8-watt LED light bulb (500lm) manufactured by Smartlight. Very quality product for 15.80€. There were found out next properties during examination: *Advantages: ** cosφ=0.88 ** too low level of flickering - safe for eyes ** no symptoms of planned obsolescence were detected ** protection against overvoltage * Disadvantages: ** too heavy heat sink ** low-efficiency diodes SMD_3020