An energy auditor is evaluating four different LED lamp options for a retrofit project. Which of the following lamps is the most energy-efficacious?
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A
Lamp A: 1600 lumens, 15 watts
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B
Lamp B: 1200 lumens, 10 watts
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C
Lamp C: 2000 lumens, 20 watts
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D
Lamp D: 800 lumens, 5 watts