Off road lights. they are typically 100 watts each. do not buy the 55 watts, because then they are jsut as bright as your headlight.
to install correctly. use a bochs 4 pin relay FOR EACH LIGHT you can connect a switch inside your cab to ALL the relays (to turn them all on at the same time). then use 10 guage wire minimum, preferably 8 gauge to run power from your battery to the relays, then use the same size wire to run a wire from a relay, to the light.
THIS will ensure that you do not have too much amperage drawing on yoru wires, and potentially causeing a fire.