what about all the heat the lighting units create that then melts Naughty wife wants sex tonight Childress away what it left of the polar ice cap? did you know that you can stirfry with the heat of just one lighting unit? now imagine 3 or 4 hundred lighting units and that would be a very small lighting rig for a concert. And the sound equip generates enough heat that large scale concerts usually have air conditioners to keep the equip from failing. yeah lets save the planet while using an excessive amount of energy to throw a bunch of concerts. good job Mr. Gore in your big fancy house flying to each venue burning what? yeah jet fuel driving in your suv. cool save the planet!