The wiring for the low beam and high beam would have to be extended so they can reach the other side. You would also have to convert the bulb holder to fit an H4 or other dual filament bulb. Then you have the issue that the two reflectors are different. (they both use an H7, but direct the light to different places). You might be able to use the low beam, but it wasn't designed to shine light above the cutoff, so it would be mediocre at best. The best solution by far if you want to run two lights would be to actually have two of each (high and low) and cut the reflectors in two and combine them. The issue with that is getting everything aligned correctly.
From what I have heard is that Honda did a study that showed car drivers see the two headlights of a motorcycle close together and they perceive it to be a car at a greater distance. That is the reasoning behind having separate lights for low/high. I just run with the high beam on during the day, seems to keep me out of trouble.
I don't think that running them both as low beams would actually help your situation much. If they didn't see you with one light on, I don't think they would see you with two. You can get an HID kit, or osram also makes an H9 on an H7 base, which is much brighter.
What you are asking about is mostly junk that they sell on ebay, they are just regular bulbs with a blue tint to them. They "look" brighter to you, but actually put out less light than any regular quality bulb.