I bought 4 Hella rocklights for really cheap (8.50 a piece) and want to install them to run off of one switch. I know that I need a relay to make this work but I have no clue as to how to make it work or what kind of relay is needed. I am assuming that there will be 4 separate sets of wires. So I would need a relay that has an input for the switch and 4 outputs for the lights? Thanks in advance.