going going gone

people who rode in horse and buggy must have been astonished to see the first auto mobile imagine how  people reacted when a picture projected on a white screen started to move and then make sounds New invention often seem strange until we get used to having them around. And then they are replaced by even more advanced invention . Edison in his laboratory in new jersey  in a world that used torches candles and gas lamps for light it must have seemed like a miracle to flip a switch and see a light go on. That  miracle  was due to Thomas  Edison and his incandescent bulb.  As electricity flows through the bulb a wire heats up and start glowing producing light. The inlandscent which  people have been using from years is slowly being replaced by more energy saving florescent  bulb that lasts about 10,000 hours or 10 time longer than the incandescent. New there are led based bulbs that give off warm yellow glow The  bulbs use very little energy and last about 50,000 hours if they burned 24/7 they'd last for almost six  years.