Originally, a first order Fresnel lens made by Chance Brothers of England had been used but together with the lantern it was dismantled during the 1980s and was then donated to a regional museum in 2004.
In 1848, when the second French Revolution forced Georges Bontemps to flee to England, he found employment at Chance Brothers, due to his longtime friendship with Chance.
It is built of reinforced concrete and surmounted by a Chance Brothers lantern.
The lamp and its housings were manufactured in England by Chance Brothers.
In 1900 he became scientific adviser to Chance Brothers of Birmingham, glass manufacturers and lighthouse engineers, and for the next six years his work was chiefly concerned with the production of optical glass and lighthouse apparatus.
From 1903 he was employed by the Birmingham-based glassmaking company of Chance Brothers, which might explain his only very moderate success with the bat.
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