wiring offroad lights

I want to add 2 - 150watt offroad lights to my car.  I've already got a switch for it, with a 14g wire coming off it.  It.  The power going to that comes from a 10g wire from the battery, to a aux fuse box, then to that switch.  My question is what is the best way to wire these lights?  Should I get a relay for each light, or will one do for both?  Will what I have make a suitable signal for the relays?

thanks in advance for your help.

http://visionxoffroad.com/product/hid-6500/default.htm

Have you seen these?

I would use 1 relay for each. Mount the relay in a safe spot under the hood Use the switch in the rig to throw a ground to trigger the relays. Get the 12volts for pin 87 from the battery directly.

You'll just need 1 relay (provided it is your average spdt) You'll only be drawing 15 to 20 amps.

30: lights