Most famous apparently bright stars are also intrinsically bright (luminous). They can be seen from great distances away. However, most of the nearby stars are intrinsically faint. If you assume we live in a typical patch of the Milky Way Galaxy (using the Copernican principle), then you deduce that most stars are puny emitters of light. The bright stars you can see in even the city are the odd ones in our galaxy! The least luminous stars have absolute magnitudes = +19 and the brightest stars have absolute magnitudes = -8.Even the intrinsically faintest star's luminosity is much, much greater than all of the power we generate here on the Earth so a "watt" or a "megawatt" are too tiny a unit of power to use for the stars. Star luminosities are specified in units of solar luminosity---relative to the Sun (so the Sun generates one solar luminosity of power). One solar luminosity is about 4 × 1026 watts.
Magnitudes and Distances for some well-known Stars (from the precise measurements of the Hipparcos mission) is what the Dataset shows.
http://www.astronomynotes.com/starprop/s4.htm