what is the difference between incandescence and florescent light bulbs?

Answer 1

Florescents are more of a greenish tint and incandescence is more of a brownish tint. If you like to paint and want to see true color, you would need proper lighting. What a lot of artists do is use 70% incandescent and 30% florescent light which is closest to daylight effect with artificial lighting.

Here is a little exerpt from Wiki, I usually do not like to use Wiki but this is a really good explanation of the two.
Incandescence occurs in light bulbs, because the filament resists the flow of electrons. This resistance heats the filament to a temperature where part of the black body radiation falls in the visible spectrum. The majority of radiation, however, is emitted in the invisible infrared and lower frequency spectrums, which is why incandescent light bulbs are very inefficient. The mechanism of the incandescence is as follows: the temperature of the filament causes electrons in it to be excited to an atomic orbital of higher energy; when an electron falls back to the more stable ground state orbital, it releases the energy thus stored, in the form of a photon. The frequency of the emitted photon is determined by the energy difference between the two orbitals. The same process occurs in plasma, of which fire is a well-known example.

Fluorescent lamps do not function by means of incandescence, rather by a combination of thermionic emission and atomic exitation.

Answer 2

Incandescent bulbs work by heating a wire white-hot by passing electric current through it. The light from an incandescent bulb has a continuous (blackbody) spectrum. Fluorescent bulbs cause mercury vapor to emit light by passing a current through the gas. Then a phosphor coating on the inside of the tube is stimulated by the short-wavelength light of the mercury vapor emissions and glows white. The light from a fluorescent is a combination of the emission spectrum of mercury and the glow of the phosphor. If you look at the rainbow reflection of the light from a CD you'll see that it consists of several discrete colors.

The big advantage of fluorescents is that they use about a fourth of the electric power to produce the same amount of light. Most of an incandescent's power consumption ends up as heat. Also, by using different phosphors, they can make fluorescents with a variety of color characteristics.