Regardless of the lamp efficiency; the use of 110V ia far less efficient than 200-250V used elsewhere.
System-wide, yes, this is true, at least from the standpoint of the amount of copper used. If incandescent lamps are the only load, it might pay to choose the optimum voltage for them. A 30V lamp would be even more efficient than a 100V lamp, but transmission efficiency would be dismal except in the smallest isolated system.
Since the early 20th century, our parallel circuits have carried diverse and ever-increasing loads, and the importance of lamp efficiency began to wane. Engineers began to agitate for higher voltages, and in many countries, they got them. Those of you who are writing on computers that run on 230VAC can thank the same bureaucracies you now complain about for setting this standard some decades ago.:D
Here in the USA, our standards are more loosely governed by a variety of competing industry groups. Decades ago, when utilities tried raising voltages, the motor manufacturers pushed back. The result is that we still have 120V for most domestic loads, fed from a transformer in the backyard rather than a substation on the edge of town!
