One participant, Jennifer Morgan from the World Resources Institute told me there was likely to be more heat than light in Doha.
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But these arguments offer more heat than light.
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Sibling semiconductors are used in light-emitting diodes, solid-state lasers and other technologies that generate heat and light far more precisely and efficiently than conventional welders, torches, ovens and bulbs.
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Mr Russill said LED light bulbs are more efficient than traditional, incandescent ones because there is less energy loss through heat.
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