The tungsten lightbulb very closely matches the color temperature of candle and oil light. Many of the complaints of early CFL and LED light bulbs was the poor quality of the color. Was the Edison bulb designed specifically to match natural light sources? or is that a coincidence?

by ch00f
thetango

It should be noted that the tungsten lightbulb was not the first incandescent light bulb. For most of the 1800's platinum and iridium filaments were used for experimentation with lightbulbs.

All incandenscents, regardless of filament type, emit as blackbody radiators. The spectra emitted does not peak in the range of the human eye, and this leads to the light being "yellower" than normal sunlight (or as you said, natural light sources).

Reference: http://www.physics.sjsu.edu/tomley/ObjectSpectra/tungstenbulb.html

[Edit: this might be better asked in r/askscience. Not disagreeing with the historical nature of the question, just saying that you might get a better answer over there...]