3 beam headlights?

I drive a 97 accord se and i was thinking about replacing my headlights with some projectors. After some researching on ebay i found that they come in 2 and 3 beam. My accord only has two bulbs for the headlights so my question is how would all 3 beams work?

My guess is the 3rd is either a city/running light (like a daytime running light) or it's an integrated fog light just like how the JDM Integras have.