Hmm how weird?... I saw these projectors on sale when they first came out by Dash Z and they claimed that it was an H1 low beam but as the days went by was changed to a H3 low beam. I also saw the same projectors on Ebay that were claiming it was an H1 low beam. I contacted Dash Z to check with them because I had ordered an H3 HID kit separately and did not want the low beams to be H1's. They assured me and they turned out to be H3's which are a significantly smaller/shorter bulb then an H1.
Did Ipex from Ebay tell you that the projectors use an H1 low beam? Did they not include bulbs? Yea if you put an H1 in there it probably goes past the cut off which results in undesirable output. Get the H3's and I'm pretty sure you won't be disappointed.