I can't believe a pilot would link to that wikipedia page. I tend to look a long time for more reputable sources before checking wikipedia but even I'm surprised at that entry. I'm guessing the entry was done as a junior high project.
What the lights mean
Whites mean too high for the approach to the runway and Reds mean too low for the approach to the runway. The best position with the lights is 2 reds and 2 whites because you are in a great position for landing.