One neat fixture and power distribution. Basically this is where the receptacles are mounted on. 50A+ twistlock receptacles. This one has a spiral lamp inside it. I've seen others that has PL-S CFLs.
I've seen something similar but with a low-wattage HPS lamp. 50A 240v and 30A 120v twist-lock plugs. (At a marina; I've plugged into those very things before!)