Snow ball effect!!
i dont recall how to figure the amp draw per watt deal. I run the 90/100watters. As far as the relays I'm running junkyard relays. I found a car with a batch of four relays i used behind the radiator. (hidden). and yes, basically the stock wires are triggers to click the relays on.
you read my little write-up on the headlights, correct?
relays, they could be a little nicer, but you cant see them anyway once the rad is in. :D