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Posted by aogMonday, 26 January 2009 at 14:11 TrackBack Ping URL

SWIPIAW was watching some concert on the TV last night. I noticed that, as usual, the performers were all sweating up a storm. My understanding is that this is generally do to the massive arrays of lights shining on the stage. What I wondered was, should LED based lighting become powerful enough to work in such situations, would the heat level be much less? And if so, would the performers sweat less? Would that detract from the authenticity of the event? Or do popular music performances demand so much activity from the performers that they’ll be sweating in anything more than arctic conditions?

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Hey Skipper Tuesday, 27 January 2009 at 13:36

What I wondered was, should LED based lighting become powerful enough to work in such situations, would the heat level be much less?

Should be. In a previous life, I happened to work a lot with stage lights. The reason the on-stage heat level is so high is that the radiation spectrum of an incandescent lamp has a lot of infrared.

So, getting enough power in the part of the spectrum we can see required lots of infrared energy as well.

The LED spectrum can be tuned. The ones I now use to illuminate my desk (replacing halogens) have practically no infrared at all. With my hand just a few millimeters away from the LEDs I can scarcely feel any heat at all. Doing the same thing with the halogens would have caused a first degree burn within seconds.

Whether the performers would sweat less depends on what they are doing on stage. My favorite band, Pink Floyd, just stood up there and played: so, not so much sweat (not that they ever did, anyway).

Pop acts, such as Madonna, for which it is as much about the dancing as the music, will still sweat like crazy.

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