Interesting reading. The 55 - 110 Volts system was used for the earlier arc lamps.
110 Volt lamps have thicker filaments and will take a bit more abuse, but more copper needed for circuit wiring.
220 Volt lamps have thinner filaments, more light output but usually fail earlier.
110-240 Volt LED lamps will use less power, but electronic driver boards are prone to early failure.


The product of rotation, excitation and flux produces electricty.