It goes without saying that today's theatrical lighting instruments are better than they have ever been before, especially in terms of output. At the foremost front of this revolution (and, no, we are not talking about ETC's latest moving light) have been the manufacturers of “cool beam” ellipsoidals, where developments in manufacturing and optical design have yielded ever more powerful lighting tools. We're all aware of the benefits afforded by ETC's exceedingly successful Source Four ...

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