The light bulb

Monday-night-wrenching-night involved the difficult removal of the R100s’s right side exhaust, so it can be replace by a shortened one too. Boy was it stuck to the header…

The photo is of the light bulbs in the headlight as an entry for the MM403 challenge.

Historians Robert Friedel and Paul Israel list 22 inventors of incandescent lamps prior to Joseph Swan and Thomas Edison. They conclude that Edison's version (1880) was able to outstrip the others because of a combination of three factors: an effective incandescent material, a higher vacuum than others were able to achieve (by use of the Sprengel pump) and a high resistance that made power distribution from a centralized source economically viable.