It's a Transformer in a box kinda thing that controls the voltage going to the light. Thats why even though a 400w hps bulb WILL fit into a regular house hold socket, but it will do nothing. That tube inside is givin a start up charge of about 6500 volts by the ballast to fire up the lamp.
So The transformer box plugs into the wall, and the light socket is wired to the transformer box.
I did have pics of it. Well I really still do but their on the wall of my new grow room and are covered by the mirrors all over the wall for reflection.
I did have pics of it. Well I really still do but their on the wall of my new grow room and are covered by the mirrors all over the wall for reflection.