The color temperature’s different.
An important observation. As one who dabbles in photography, you can easily tell that the light spectrum of various forms of lighting are different. Even without the camera, we can see the difference between a "warm white" and a "daylight" compact florescent bulb.
Measuring lumen output without a specifying color temperature range is bound to provide a misleading number. 1000 lumens from a standard incandescent bulb will appear to be a different brightness than 1000 lumens from a high-pressure sodium streetlight.
Also, some lights put out a wide spectrum of color whereas some lighting illuminates over only a narrow band of visible light. Incandescent lights are a broad spectrum light source. Although the color temperature is around 2700 degrees K, they put out light over the entire visible light band. Flourescents, on the other hand, use 3 or 4 different phosphor coatings to produce a similar visible color, but yet when viewed with a spectroscope, their output will show up as 3 or 4 distinct bands of color output. They are not a wide-spectrum source, but are multi-coated to give the visible appearance that they are.