Here is a video of my 400 watt HPS M400 R2 Lighting up. Note: For a while, you wont see the light turning on, cause i  had to go over to the plug and plug it in. So thats why you see a wire moving later. THen it turns on and you can see a usual light turning on like it just turned dark! Another note: It was daylight outside, so the photocontrol had electric tape on it, so it wouldn't go out.

Link:
http://www.youtube.com/watch?v=IcWF27dEnHw

Very cool Video! Where do you acquire this fixture? Ebay?

By the way, Welcome to Lighting Gallery!! You will find lots of really good information on lots of kinds of lights here!

Yep. ebay. i got it a long time ago. searched street light on ebay, found one. But when i got it, there was no photocontrol, but i bought one, and its good now. (but one of the wires broke off the slide in the socket thingies, so i electric taped them together, and it works great now) (plus when i bought it, i didnt know what the photocontrol was, so i called the photocontrol the "knob" xD But i learned otherwise. xD