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Who invented the Yahrtzeit tablet (panel)?

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At first glance, this could not have been common before 150 years ago, as there is no room to place candles where the electric lights go.

Who invented it, and is it mentioned anywhere in seforim?

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The Gabboim invented this for raising money for the shuls and themselves :p – MoriDoweedhYaAgob Mar 13 at 2:56
Why do you suspect candles matter? Maybe in Europe they just had names? And btw they had electricity in Europe too. – Double AA♦ Mar 13 at 3:04
They used electricity in 1600's poland? – Shmuel Brin Mar 13 at 3:05
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They did in 1900. In Europe. One of the most famous responsa about electricity and Shabbat was authored by the Chief Rabbi of Vilna (Chaim Ozer Gradinsky in his Achiezer). – Double AA♦ Mar 13 at 3:05
@DoubleAA fine. Maybe it was invented in the (relatively recent) 1900's Poland. Not Pre-Historic (1500) Poland – Shmuel Brin Mar 13 at 3:14
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