here is a 4 light flip that uses dayton relays from grainger.com I use it on 1000 watt lights and have never had a problem. The relays come in 2 pieces the relay and the base the relay is model #5yr16 and the base is 2a582m I had this diagram made up for someone else a while back hope it helps. I had to down size it alot if anyone wants a better copy pm me and I will get it to you in a bigger size