Thanks and sorry for the limited explanation. I have lights that I shoot in my studio that plug into a giant power supply and then you use a radio slave to trigger them, just giant strobes really that plug into the wall. My tank is a 54 bowfront that goes through the wall. I put one flash on the top backside of the tank and one on the top in front. You can control output from the power supply as well as the head. I focus with the tank lights and then the strobes fire when I shoot. This sounds more confusing than my first explanation, sorry. Suffice it to say that it takes a bit to set up and fortunately my wife had already headed to the back of the house to read for a while so she wouldn't call to have me committed.