RichardMacgurn says:

Definitely a fake space walk. I watched the entire 19 minutes frame by frame with my CS3 film editor and found lots of bubbles and lots of digitally edited sections where bubbles were removed. The big giveaway is the buoyancy of the tether lines and the way the flag moves. Besides that it’s easy to fake something like this in a NBL, just remove the extra blue tinge, and presto!

Did you also see this newer video?

http://www.youtube.com/watch?v=NVbBFwdmldA

As for the “lamps” – if you watch all 19 minutes of the “walk” you see several reverse angle shots which show the 2 cameras used and no lighting. The “lamps” are from way overhead as in a typical NBL lighting setup.