... ROHS 4,plastic material led corn bulb E27 3528smd bodymaterial:plasticled source:3528SMD,white/warm white ... a stark contrast to the average life of an incandescent bulb, which is approximately 5000 hours. ... is reduced power consumption. When designed properly, an LED circuit will approach 80% efficiency, which means ... bulb is used for 1 year, with an electrical cost of 10 cents/kilowatt hour, ...