I'm back with more n00bish questions

[47_MasoN_47]

I've been Googling about for an hour or so, and there's just too much information out there to sort through. I'm rather confused about the headlights. Some of you guys may remember me asking a similar question a few months ago, but after the rains we've had this winter I just can't live with the rather wimpy lights my Yaris sedan has.

If I buy this does it convert the stock headlights or do I have to buy a different housing?

Is the above a good option for increasing my brightness (I need a significant increase, 2-3x stock brightness would be good) or am I doing it wrong?

Thanks...sorry to make you guys put up with my n00b questions again.