Here's a closer view. There are six indicator lights, each light comes on only when the relay it's wired to becomes energized. Each relay has a timer on it, so when voltage is put to it, the timer times out and then 5 seconds later a light comes on. It indicates when a certian process occurs on a conveyer system. The transformer steps down 208 volts to 120 volts. This is called a control transfomer. The garbage can looking things on the telephone poles out side are transfomers and usually take in 12,500 volts and steps it down to a much safer 240/120 volts for our houses. Ahhhh the wonder of electricity.