Even though a pure tungsten filament doesn't emit a black body spectrum directly from its surface, incandescent bulb filaments were designed to more closely approach the black body emission curve by being made as a "coiled coil," a very fine wire, wound into a very fine coil, with this fine coil itself coiled into a larger coil. In this way, each "surface element" of the filament was caused to "see" many other surface elements of itself; the bouncing back and forth of the average photon between these different surfaces caused some absorption and re-emission.
It is this equilibrium between absorbed and re-emitted photons that gives the beautiful black-body characteristic, similar to that generated by the hot carbon particles in a candle flame or wood fire.
Sunlight also is a fairly good approximation of a black body, albeit at something like 6500° K. I very much dislike LED and CF lamps. These (in effect) give "pixel color," meaning that they try to approximate natural light by combining light various fairly narrow wavelength bands. LEDs are worse than CF lamps because LEDs generate very narrow "spectral lines."
Thus, we are seeing a transition to what might be called "digital light" to go with the recent transition to "digital images" and "digital audio."
Here, the word "recent" means "over the past 30 years or so."
I believe that the human eye is not well adapted to "digital light." That's why sunlight - and light from incandescent light bulbs - is so pleasant.
In my basement, I have enough old fashioned 60W bulbs to last the rest of my life.
Ordinary incandescents do have an advantage in that they are (mostly) full spectrum light, however, since I got into photography always find them too orange and dimmer than they should be. Somehow (as I gained the ability to gauge color temperature) my brain has lost it’s ability for my brain to adapt to the color temperature of ordinary tungsten bulbs.
Daylight balance bulbs are still too “cold” for my tastes (ironically higher temperature is more bluish and is perceived as being colder), but I really love those halogen bulbs they put in the form factor of a standard bulb. The light from those is just wonderful, ironically they never would have been put on the market if it wasn’t for the government sticking it’s nose into everybody’s lives. . . so I just have look at it as the private sector finding clever solutions to find their way around odious regulations.
Unfortunately, the wiring in my home is terrible and causes any kind of incandescent bulbs to burn out frequently, so I use the halogens to light my photographs and use LEDs in all the hard to reach places, which are common because I live in a home with cathedral ceilings in half the rooms. I don’t mind LED too much, but I definitely notice certain colors don’t look as vibrant as they should because they emit discrete frequencies of light. Reds in particular, appear duller.
Now CFLs, I don’t think you could pay me enough to have one of those in my home. Whomever came up with that garbage should be hanged, along with the politicians that attempted to foist them on the nation.