Fred Davis Corporation Newsletter

Archive for October, 2019

Federal Dollars Pushing Commercial Efficiency: L-Prize Update

The Department of Energy wants to significantly stimulate the efficiency of commercial lighting products. A decade ago, their original Lighting Prize revolutionized screw-in bulbs. Now the current competition is even more ambitious: a multi-year project with serious money, hoping “to unlock the … future of illumination in commercial and institutional buildings.” It’s come along since [ ...

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Terms and Definitions: Efficacy vs Efficiency

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In our upcoming posts, we will survey the current status of LED fixtures across different categories. As you read, lighting terminology will be important. Most critical is the difference between lighting efficacy and lighting efficiency, two different measures of output over input. Efficacy: Efficacy is the ratio of light output (lumens) to energy input (watts). […] …

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