It's the same as the old one. It handles up to 1,000 watts so the same relay is used by Brinks for a wide range of lights.
It has a three prong socket with one leg wider than the other two, so you can't put a prong in the wrong hole (Murphy's Law engineered). You put it in the socket, push down...
I installed a consumer model, Brinks 100 watt metal halide security light on my mother's out-building. She liked that it really lit up the back yard. It worked for less than a year and then I had to replace the ignitor. The light has now been up about 5 years during which I replaced the bulb...