In the infrared discovery experiment, why did infrared light produce more heat than visible light when infrared has a lower energy than visible light?

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In the infrared discovery experiment, why did infrared light produce more heat than visible light when infrared has a lower energy than visible light?

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Individually the photons have lower energy than their visible companions, but they’re present in vast quantities. At ground level, more than half of the sun’s total energy is infrared.