Here's a remote ballast area light I found lighting a small convenience store parking lot. The ballast box has a photocontrol on top and has a presumably MV ballast inside.
Not sure if it would be considered a remote ballast, in a way it seems more like a some kind of "powerbracket" but then again, it doesn't seem to have a replaceable ballast........this is INDEED a great find though.....now not sure, but looking at the lamp in it...but does it look 400 watt sized? You'll have to look at the lamp size......
Thanks Jace, I guess this one might be a 400 watter but I didn't get a clear view of the lamp and this fixture is located pretty far from me. I also found gumball with a similar ballast box attached to it closer to me.