I work for a company that do lighting and sound and the guys who i work with dont particually like pink floyd but we have the dvd as if your a lampy its like looking at light heaven! the planning and pre production that had to be done for that show was unbelievable. for example the Circular Projection screen that they use has about 30 moving head lights on it. not sure of prices then but now each light will set you back about £4K minimum so thats £120'000 just for that bit and there are hundreds more! Each of the lazers they use is worth over a million! for light geeks like us its just like porn! just makes it more interesting for me cos i love them!