Comment Re:Earth-like lights (Score 1) 90
It doesn't make much of a difference to Kepler.
Kepler measures the light level over time, and uses the amount of obstructed time to make most of it's calculations. It does also use the total light output difference to determine the size of the planet (really the ratio of the size of the planet to the size of the star) - but the error bars are pretty big anyway, way more than the total light output of dark side of the Earth.
The only way that Kepler would miss the planet all together was if the alien civilization made their planet put out as much light as their star.... Not very likely. An advanced civilization might want to make their planet as bright as daylight all the time, but that would be much less bright than the star.