sorry I gave you a bit of bad info, I looked it up and the LR3 uses a h7 high beam, so it probaly has a Bixenon + halogen.
But it is not an uncommon design and there are others like the murano, that use a single bixenon projector for all functions.
Is it a good design or a bad design i cant say, but its out there. And how often do you actualy flash your high beams during the day, If you did it every day for minutes on end, probably bad for bulbs and ballast. If you do it a few times a month i don't think it is anything to worry about. I think the flashing HID will imediatly destroy your bulbs and ballast is the "pop rocks" and soda myth of hidplanet.