This is a decent PSU from a desktop tower. I forget the wattage but it's strong enough to run three LED bars/strips on each rail, and there are three 12v rails. I put a push button toggle switch in the PSU casing top. The first two pictures show where I put a connector on the power on trip lead. The second row shows the rear where I reattached the wires to the case. I soldered and shrink wrapped at least once all connections. I hung the bar above my work bench. I will make more bars and light when I get the time. I also need to clean.