I wonder how much is spent on their light show?
With the prices of high power pro grade intelligent lighting I wouldn't be surprised if that rig is $1.5M+. Supposedly Tiesto had $1M in lights with him on the ISOS5 tour. This is a mixture of Tiesto's gear and the production company that threw the party.

http://www.youtube.com/watch?v=p2Ykw46R3rEhttp://www.youtube.com/watch?v=NrpYKZGW-T8&NR=1When you figure in the huge projection screen and the crazy towers this is probably in the $350-500k range, and I don't think it's even close to the gear that Daft Punk has.
It's great to go to some huge outdoor spectacle with enough people to populate a small city and lights that can be seen from the moon once in a while. More often than not though I'd rather be in a smaller, darker, dirtier venue with a couple screens, couple lasers, and a strobe and fogger, and actually be able to see the DJ and shake his hand afterward if I want to than deal with an enormous crowd.