In a natural experiment, ISR’s Achyuta Adhvaryu and colleagues compared day-by-day temperatures and garment factory production in Bangalore among factories before and after they switched from fluorescent to LED lights – which emit much less heat. They found temps above 85 degrees hurt factory productivity and profits, and since LED lights reduced temps on the factory floor by about 4 degrees, the switch to LEDs among fluorescent-lit factories is a good option for energy saving, productivity, and employee well-being in India’s un-airconditioned factories.

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