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?